ath79: enable wrgg MTD splitter

This is required for the D-Link DAP-2695-A1.

Signed-off-by: Stijn Tintel <[email protected]>

target/linux/ath79/config-4.19

@@ -171,6 +171,7 @@ CONFIG_MTD_SPLIT_LZMA_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y
+CONFIG_MTD_SPLIT_WRGG_FW=y
 CONFIG_MTD_VIRT_CONCAT=y
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NEED_PER_CPU_KM=y

target/linux/ath79/config-5.4

@@ -178,6 +178,7 @@ CONFIG_MTD_SPLIT_LZMA_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y
+CONFIG_MTD_SPLIT_WRGG_FW=y
 CONFIG_MTD_VIRT_CONCAT=y
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NEED_PER_CPU_KM=y