ramips: fix the number of uarts for each SoC

- Use default number of uarts (2) for rt288x/rt305x/rt3883/mt7620.
- Allow up to 3 uarts on MT7621 and MT7628.
- Remove unneeded SERIAL_8250_RT288X for MT7628.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

target/linux/ramips/mt7620/config-4.4

@@ -180,7 +180,6 @@ CONFIG_SCHED_HRTICK=y
 # CONFIG_SCHED_INFO is not set
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250_FSL is not set
-CONFIG_SERIAL_8250_NR_UARTS=4
 CONFIG_SERIAL_8250_RT288X=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SOC_MT7620=y

target/linux/ramips/mt7621/config-4.4

@@ -218,7 +218,8 @@ CONFIG_SCHED_HRTICK=y
 CONFIG_SCHED_SMT=y
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250_FSL is not set
-CONFIG_SERIAL_8250_NR_UARTS=4
+CONFIG_SERIAL_8250_NR_UARTS=3
+CONFIG_SERIAL_8250_RUNTIME_UARTS=3
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SMP=y
 CONFIG_SMP_UP=y

target/linux/ramips/mt7628/config-4.4

@@ -177,8 +177,8 @@ CONFIG_SCHED_HRTICK=y
 # CONFIG_SCHED_INFO is not set
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250_FSL is not set
-CONFIG_SERIAL_8250_NR_UARTS=4
-CONFIG_SERIAL_8250_RT288X=y
+CONFIG_SERIAL_8250_NR_UARTS=3
+CONFIG_SERIAL_8250_RUNTIME_UARTS=3
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SOC_MT7620=y
 # CONFIG_SOC_MT7621 is not set

target/linux/ramips/rt288x/config-4.4

@@ -164,7 +164,6 @@ CONFIG_SCHED_HRTICK=y
 # CONFIG_SCHED_INFO is not set
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250_FSL is not set
-CONFIG_SERIAL_8250_NR_UARTS=4
 CONFIG_SERIAL_8250_RT288X=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_SOC_MT7620 is not set

target/linux/ramips/rt305x/config-4.4

@@ -166,7 +166,6 @@ CONFIG_SCHED_HRTICK=y
 # CONFIG_SCHED_INFO is not set
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250_FSL is not set
-CONFIG_SERIAL_8250_NR_UARTS=4
 CONFIG_SERIAL_8250_RT288X=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_SOC_MT7620 is not set

target/linux/ramips/rt3883/config-4.4

@@ -174,7 +174,6 @@ CONFIG_SCHED_HRTICK=y
 # CONFIG_SCHED_INFO is not set
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250_FSL is not set
-CONFIG_SERIAL_8250_NR_UARTS=4
 CONFIG_SERIAL_8250_RT288X=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_SOC_MT7620 is not set