arch/x86: Remove most C_ENV_BOOTBLOCK_SIZE limits

With top-aligned bootblock this is no longer globally needed.
The default maximum is now a generous 256 KiB with couple
platforms having lower limits of 32 KiB and 64 KiB.

Change-Id: Ib1aee44908c0dcbc17978d3ee53bd05a6200410c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47600
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/mainboard/aopen/dxplplusu/Kconfig b/src/mainboard/aopen/dxplplusu/Kconfig
index 0036915..4ee9b73 100644
--- a/src/mainboard/aopen/dxplplusu/Kconfig
+++ b/src/mainboard/aopen/dxplplusu/Kconfig
@@ -26,8 +26,4 @@
 	int
 	default 4
 
-config C_ENV_BOOTBLOCK_SIZE
-	hex
-	default 0x4000
-
 endif # BOARD_AOPEN_DXPLPLUSU
diff --git a/src/mainboard/emulation/qemu-i440fx/Kconfig b/src/mainboard/emulation/qemu-i440fx/Kconfig
index 1b61871..9b990ce 100644
--- a/src/mainboard/emulation/qemu-i440fx/Kconfig
+++ b/src/mainboard/emulation/qemu-i440fx/Kconfig
@@ -76,7 +76,7 @@
 
 config C_ENV_BOOTBLOCK_SIZE
 	hex
-	default 0x4000
+	default 0x10000
 
 config DCACHE_BSP_STACK_SIZE
 	hex
diff --git a/src/mainboard/emulation/qemu-q35/Kconfig b/src/mainboard/emulation/qemu-q35/Kconfig
index d88d0da..5a77ded 100644
--- a/src/mainboard/emulation/qemu-q35/Kconfig
+++ b/src/mainboard/emulation/qemu-q35/Kconfig
@@ -85,10 +85,6 @@
 	bool
 	default n
 
-config C_ENV_BOOTBLOCK_SIZE
-	hex
-	default 0x4000
-
 config DCACHE_BSP_STACK_SIZE
 	hex
 	default 0x4000
diff --git a/src/mainboard/facebook/fbg1701/Kconfig b/src/mainboard/facebook/fbg1701/Kconfig
index 9e7ab69..e01f979 100644
--- a/src/mainboard/facebook/fbg1701/Kconfig
+++ b/src/mainboard/facebook/fbg1701/Kconfig
@@ -92,10 +92,6 @@
 	bool "TPM Setup in RAMSTAGE"
 	default n
 
-config C_ENV_BOOTBLOCK_SIZE
-	hex "C Bootblock Size"
-	default 0x4000
-
 config VENDORCODE_ELTAN_VBOOT_SIGNED_MANIFEST
 	depends on USE_VENDORCODE_ELTAN
 	bool
diff --git a/src/mainboard/portwell/m107/Kconfig b/src/mainboard/portwell/m107/Kconfig
index bc06151..3935b38 100644
--- a/src/mainboard/portwell/m107/Kconfig
+++ b/src/mainboard/portwell/m107/Kconfig
@@ -63,8 +63,4 @@
 	bool
 	default y
 
-config C_ENV_BOOTBLOCK_SIZE
-	hex "C Bootblock Size"
-	default 0x4000
-
 endif # BOARD_PORTWELL_M107