soc/intel/icelake: Set DCACHE_BSP_STACK_SIZE default ~129KiB unconditionally

Icelake default selects PLATFORM_USES_FSP2_1 which means stack will be shared
between FSP and coreboot (CONFIG_FSP_USES_CB_STACK) hence no need to have any
other default value than 129KiB (128KiB for FSP and 1KiB for coreboot)

Change-Id: I856f7e48a4a1e86eb082b9e772e0776664edca51
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36538
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/icelake/Kconfig b/src/soc/intel/icelake/Kconfig
index 86f1ff5..a04993d 100644
--- a/src/soc/intel/icelake/Kconfig
+++ b/src/soc/intel/icelake/Kconfig
@@ -70,8 +70,7 @@
 
 config DCACHE_BSP_STACK_SIZE
 	hex
-	default 0x20400 if FSP_USES_CB_STACK
-	default 0x4000
+	default 0x20400
 	help
 	  The amount of anticipated stack usage in CAR by bootblock and
 	  other stages. In the case of FSP_USES_CB_STACK default value will be