payloads/edk2: Add Kconfig to enable UFS support

Add a Kconfig to selectively enable the UFS DXE driver recently added
to MrChromebox's edk2 fork. When selected, will enable booting from
devices with UFS storage.

TEST=tested with rest of patch train

Change-Id: I0b54d21dc87abf6938c03948830f92ce5097ef7d
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81870
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

payloads/external/Makefile.mk

@@ -195,6 +195,7 @@ $(obj)/UEFIPAYLOAD.fd: $(DOTCONFIG)
 		CONFIG_EDK2_GOP_FILE=$(CONFIG_EDK2_GOP_FILE) \
 		CONFIG_INTEL_GMA_VBT_FILE=$(CONFIG_INTEL_GMA_VBT_FILE) \
 		CONFIG_EDK2_DISABLE_TPM=$(CONFIG_EDK2_DISABLE_TPM) \
+		CONFIG_EDK2_UFS_ENABLE=$(CONFIG_EDK2_UFS_ENABLE) \
 		GCC_CC_x86_32=$(GCC_CC_x86_32) \
 		GCC_CC_x86_64=$(GCC_CC_x86_64) \
 		GCC_CC_arm=$(GCC_CC_arm) \

payloads/external/edk2/Kconfig

@@ -290,6 +290,15 @@ config EDK2_DISABLE_TPM
 	  Select this option to disable TPM support in edk2. This is necessary to avoid boot
 	  hangs on some boards with a CR50 TPM, particularly those with an AMD Zen SoC.
 
+config EDK2_UFS_ENABLE
+	bool "Enable UFS DXE driver in edk2"
+	depends on EDK2_REPO_MRCHROMEBOX
+	default n
+	help
+	  Select this option to enable the UFS DXE driver in MrChromebox's fork of edk2.
+	  It is needed for boards with UFS storage, but can cause issues with other boards,
+	  so should only be enabled when needed.
+
 config EDK2_CUSTOM_BUILD_PARAMS
 	string "edk2 additional custom build parameters"
 	default "-D VARIABLE_SUPPORT=SMMSTORE" if EDK2_REPO_MRCHROMEBOX && SMMSTORE_V2

payloads/external/edk2/Makefile

@@ -137,6 +137,10 @@ endif
 ifeq ($(CONFIG_EDK2_DISABLE_TPM),y)
 BUILD_STR += -D TPM_ENABLE=FALSE
 endif
+# UFS_ENABLE			= FALSE
+ifeq ($(CONFIG_EDK2_UFS_ENABLE),y)
+BUILD_STR += -D UFS_ENABLE=TRUE
+endif
 
 endif