Kconfig: Escape variables

New kconfig parsers interpret $(var) themselves, leading to empty
fields. Old kconfig understands \$(var), so use that.

Change-Id: I927fc9dc7a66211bfe51d4324cf7c51b555ea3a8
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55912
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/clevo/cml-u/Kconfig b/src/mainboard/clevo/cml-u/Kconfig
index 6d388e7..dfec9e1 100644
--- a/src/mainboard/clevo/cml-u/Kconfig
+++ b/src/mainboard/clevo/cml-u/Kconfig
@@ -39,7 +39,7 @@
 
 config DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb"
+	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
 config CBFS_SIZE
 	hex
diff --git a/src/mainboard/clevo/kbl-u/Kconfig b/src/mainboard/clevo/kbl-u/Kconfig
index c8c364b..07f6fbb 100644
--- a/src/mainboard/clevo/kbl-u/Kconfig
+++ b/src/mainboard/clevo/kbl-u/Kconfig
@@ -49,14 +49,14 @@
 
 config DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb"
+	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
 config FMDFILE
 	string
-	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/variants/$(CONFIG_VARIANT_DIR)/fmds/vboot-ro.fmd"	if VBOOT && !VBOOT_SLOTS_RW_A
+	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/variants/\$(CONFIG_VARIANT_DIR)/fmds/vboot-ro.fmd"	if VBOOT && !VBOOT_SLOTS_RW_A
 	# TODO
-#	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/fmds/vboot-roa.fmd"	if VBOOT_SLOTS_RW_A && !VBOOT_SLOTS_RW_AB
-#	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/fmds/vboot-roab.fmd"	if VBOOT_SLOTS_RW_AB
+#	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/fmds/vboot-roa.fmd"	if VBOOT_SLOTS_RW_A && !VBOOT_SLOTS_RW_AB
+#	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/fmds/vboot-roab.fmd"	if VBOOT_SLOTS_RW_AB
 
 config DIMM_MAX
 	int
diff --git a/src/mainboard/kontron/mal10/Kconfig b/src/mainboard/kontron/mal10/Kconfig
index f53746d..8a4cf6d 100644
--- a/src/mainboard/kontron/mal10/Kconfig
+++ b/src/mainboard/kontron/mal10/Kconfig
@@ -49,10 +49,10 @@
 
 config DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb"
+	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
 config OVERRIDE_DEVICETREE
 	string
-	default "carriers/$(CONFIG_CARRIER_DIR)/overridetree.cb"
+	default "carriers/\$(CONFIG_CARRIER_DIR)/overridetree.cb"
 
 endif
diff --git a/src/mainboard/purism/librem_cnl/Kconfig b/src/mainboard/purism/librem_cnl/Kconfig
index 591367d..5763a19 100644
--- a/src/mainboard/purism/librem_cnl/Kconfig
+++ b/src/mainboard/purism/librem_cnl/Kconfig
@@ -37,7 +37,7 @@
 
 config DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb"
+	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
 config CBFS_SIZE
 	hex
diff --git a/src/mainboard/siemens/chili/Kconfig b/src/mainboard/siemens/chili/Kconfig
index 4569762..54e8f4f 100644
--- a/src/mainboard/siemens/chili/Kconfig
+++ b/src/mainboard/siemens/chili/Kconfig
@@ -53,11 +53,11 @@
 
 config DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb"
+	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
 config INTEL_GMA_VBT_FILE
 	string
-	default "src/mainboard/$(MAINBOARDDIR)/variants/$(CONFIG_VARIANT_DIR)/data.vbt"
+	default "src/mainboard/\$(MAINBOARDDIR)/variants/\$(CONFIG_VARIANT_DIR)/data.vbt"
 
 config CBFS_SIZE
 	hex
diff --git a/src/mainboard/system76/whl-u/Kconfig b/src/mainboard/system76/whl-u/Kconfig
index e93b421..a734547 100644
--- a/src/mainboard/system76/whl-u/Kconfig
+++ b/src/mainboard/system76/whl-u/Kconfig
@@ -32,7 +32,7 @@
 
 config OVERRIDE_DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/overridetree.cb"
+	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
 config MAINBOARD_PART_NUMBER
 	string
diff --git a/src/mainboard/ti/beaglebone/Kconfig b/src/mainboard/ti/beaglebone/Kconfig
index 7881bdf..d42483a 100644
--- a/src/mainboard/ti/beaglebone/Kconfig
+++ b/src/mainboard/ti/beaglebone/Kconfig
@@ -32,6 +32,6 @@
 
 config FMDFILE
 	string
-	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/board.fmd"
+	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/board.fmd"
 
 endif # BOARD_TI_BEAGLEBONE