mvebu: cortexa9: enable seil-fw mtdsplit driver

Enable seil-fw driver on mvebu/cortexa9 to use it on IIJ SA-W2.

Signed-off-by: INAGAKI Hiroshi <[email protected]>

target/linux/mvebu/cortexa9/config-5.15

@@ -1,3 +1,4 @@
 CONFIG_LED_TRIGGER_PHY=y
+CONFIG_MTD_SPLIT_SEIL_FW=y
 CONFIG_PHY_MVEBU_A38X_COMPHY=y
 CONFIG_RTC_DRV_MV=y

target/linux/mvebu/cortexa9/config-6.1

@@ -3,6 +3,7 @@ CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CURRENT_POINTER_IN_TPIDRURO=y
 CONFIG_IRQSTACKS=y
 CONFIG_LED_TRIGGER_PHY=y
+CONFIG_MTD_SPLIT_SEIL_FW=y
 CONFIG_PHY_MVEBU_A38X_COMPHY=y
 CONFIG_RTC_DRV_MV=y
 CONFIG_THREAD_INFO_IN_TASK=y