intel/mohonpeak: Change SEABIOS_MALLOC_UPPERMEMORY to config_seabios

Instead of the SEABIOS_MALLOC_UPPERMEMORY option, use a saved SeaBIOS
.config file to do the same thing.

Change-Id: I29110a382b7770329ef938876426e571fbbbb339
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/12569
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
diff --git a/src/mainboard/intel/mohonpeak/Kconfig b/src/mainboard/intel/mohonpeak/Kconfig
index 8ea184b..8f6e077 100644
--- a/src/mainboard/intel/mohonpeak/Kconfig
+++ b/src/mainboard/intel/mohonpeak/Kconfig
@@ -71,10 +71,10 @@
 	help
 	  The Mohon Peak board uses COM2 (2f8) for the serial console.
 
-config SEABIOS_MALLOC_UPPERMEMORY
-	bool
-	default n
-	help
+  config PAYLOAD_CONFIGFILE
+  	string
+  	default "$(top)/src/mainboard/$(MAINBOARDDIR)/config_seabios"
+  	help
 	  The Avoton/Rangeley chip does not allow devices to write into the 0xe000
 	  segment.  This means that USB/SATA devices will not work in SeaBIOS unless
 	  we put the SeaBIOS buffer area down in the 0x9000 segment.
diff --git a/src/mainboard/intel/mohonpeak/config_seabios b/src/mainboard/intel/mohonpeak/config_seabios
new file mode 100644
index 0000000..f688f2b
--- /dev/null
+++ b/src/mainboard/intel/mohonpeak/config_seabios
@@ -0,0 +1,5 @@
+#  The Avoton/Rangeley chip does not allow devices to write into the 0xe000
+#  segment.  This means that USB/SATA devices will not work in SeaBIOS unless
+#  we put the SeaBIOS buffer area down in the 0x9000 segment.
+
+# CONFIG_MALLOC_UPPERMEMORY is not set