intel car: Remove references to DCACHE_RAM_ROMSTACK_SIZE

Not referenced in code.

Change-Id: Iea91f4418eb122fb647ec0f4f42cb786e8eadf23
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/17268
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/soc/intel/baytrail/Kconfig b/src/soc/intel/baytrail/Kconfig
index 4009785..f4c7e11 100644
--- a/src/soc/intel/baytrail/Kconfig
+++ b/src/soc/intel/baytrail/Kconfig
@@ -99,9 +99,9 @@
 # | MRC usage   |
 # |             |
 # +-------------+ DCACHE_RAM_BASE + DCACHE_RAM_SIZE
-# |  Stack      |\
-# |    |        | * DCACHE_RAM_ROMSTAGE_STACK_SIZE
-# |    v        |/
+# |  Stack      |
+# |    |        |
+# |    v        |
 # +-------------+
 # |    ^        |
 # |    |        |
@@ -131,13 +131,6 @@
 	help
 	  The amount of cache-as-ram region required by the reference code.
 
-config DCACHE_RAM_ROMSTAGE_STACK_SIZE
-	hex
-	default 0x800
-	help
-	  The amount of anticipated stack usage from the data cache
-	  during pre-RAM ROM stage execution.
-
 config RESET_ON_INVALID_RAMSTAGE_CACHE
 	bool "Reset the system on S3 wake when ramstage cache invalid."
 	default n