ramips: disable CONFIG_MTD_SPLIT_FIRMWARE

It's no longer needed as all mt7621 devices use DT binding (supported by
upstream mtd code) for specifying "firmware" part format explicitly.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/mt7620/config-4.14

@@ -158,7 +158,6 @@ CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=16384
-CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_JIMAGE_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y

target/linux/ramips/mt76x8/config-4.14

@@ -153,7 +153,6 @@ CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SPI_NOR=y
-CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y
 CONFIG_MTD_SPLIT_TRX_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y

target/linux/ramips/rt288x/config-4.14

@@ -144,7 +144,6 @@ CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SPI_NOR=y
-CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_LZMA_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y
 CONFIG_MTD_SPLIT_WRGG_FW=y

target/linux/ramips/rt305x/config-4.14

@@ -135,7 +135,6 @@ CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=16384
-CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_JIMAGE_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y

target/linux/ramips/rt3883/config-4.14

@@ -149,7 +149,6 @@ CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=16384
-CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_JIMAGE_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y