soc/amd/stoneyridge: Enable SPI writes

- Change soc/amd/stoneyridge/Kconfig to set BOOT_DEVICE_SUPPORTS_WRITES

BUG=b:65485690
TEST=Build & boot kahlee.

Change-Id: I595a27ac27daa42c2499de1a343bc30be9a89fa6
Signed-off-by: John E. Kabat Jr <john.kabat@scarletltd.com>
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/22636
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/amd/common/Makefile.inc

@@ -16,7 +16,6 @@ ramstage-y += amd_pci_util.c
 ramstage-y += def_callouts.c
 ramstage-y += heapmanager.c
 ramstage-$(CONFIG_SPI_FLASH) += spi.c
-
 subdirs-$(CONFIG_SOC_AMD_COMMON_BLOCK) += block
 
 endif

src/soc/amd/stoneyridge/Kconfig

@@ -50,6 +50,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_AMD_COMMON_BLOCK_CAR
 	select C_ENVIRONMENT_BOOTBLOCK
 	select BOOTBLOCK_CONSOLE
+	select BOOT_DEVICE_SUPPORTS_WRITES if BOOT_DEVICE_SPI_FLASH
 	select RELOCATABLE_MODULES
 	select PARALLEL_MP
 	select PARALLEL_MP_AP_WORK