sm8450-common: avb: Compile recovery image as a chain partition

Add AVB flags to compile recovery image
as a chained partition. This is required
for safe OTA when multislot support is
not present.

Change-Id: I1115eba4038e6fcaa61440846a25861366996ed4
Signed-off-by: Volodymyr Zhdanov <[email protected]>

BoardConfigCommon.mk

@@ -83,6 +83,10 @@ TARGET_BOARD_PLATFORM := taro
 BOARD_AVB_ENABLE := true
 BOARD_AVB_MAKE_VBMETA_IMAGE_ARGS += --set_hashtree_disabled_flag
 BOARD_AVB_MAKE_VBMETA_IMAGE_ARGS += --flags 2
+BOARD_AVB_RECOVERY_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
+BOARD_AVB_RECOVERY_ALGORITHM := SHA256_RSA2048
+BOARD_AVB_RECOVERY_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
+BOARD_AVB_RECOVERY_ROLLBACK_INDEX_LOCATION := 1
 BOARD_AVB_VBMETA_SYSTEM := system product
 BOARD_AVB_VBMETA_SYSTEM_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
 BOARD_AVB_VBMETA_SYSTEM_ALGORITHM := SHA256_RSA2048