mb/google/dedede: Select Recovery Cache Kconfig option

BUG=none
BRANCH=none
TEST=Boot WaddleDoo in recovery and populate the recovery MRC cache.
     The subsequent recovery boot should boot out of the stored
     recovery MRC cache and skip memory training.

Change-Id: Ief86fe481c94abef3754881cf1f454699fbfa52e
Signed-off-by: Meera Ravindranath <meera.ravindranath@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41162
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/dedede/Kconfig

@@ -32,6 +32,8 @@ config CHROMEOS
 	select GBB_FLAG_FORCE_DEV_BOOT_USB
 	select GBB_FLAG_FORCE_DEV_BOOT_LEGACY
 	select GBB_FLAG_FORCE_MANUAL_RECOVERY
+	select HAS_RECOVERY_MRC_CACHE
+	select MRC_CLEAR_NORMAL_CACHE_ON_RECOVERY_RETRAIN
 	select VBOOT_LID_SWITCH
 
 config DEVICETREE