serial: pxa: use kconfig for serial configuration

Migrate the PXA serial driver to be configured via Kconfig.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Marek Vasut <marex@denx.de>

configs/colibri_pxa270_defconfig

@@ -13,6 +13,7 @@ CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
+CONFIG_PXA_SERIAL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_OF_LIBFDT=y

configs/h2200_defconfig

@@ -24,3 +24,4 @@ CONFIG_SYS_PROMPT="> "
 # CONFIG_CMD_NFS is not set
 CONFIG_CMD_PING=y
 # CONFIG_CMD_MISC is not set
+CONFIG_PXA_SERIAL=y

configs/zipitz2_defconfig

@@ -14,6 +14,7 @@ CONFIG_CMD_USB=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
+CONFIG_PXA_SERIAL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_LCD=y

drivers/serial/Kconfig

@@ -407,4 +407,10 @@ config MSM_SERIAL
 	  for example APQ8016 and MSM8916.
 	  Single baudrate is supported in current implementation (115200).
 
+config PXA_SERIAL
+	bool "PXA serial port support"
+	help
+	  If you have a machine based on a Marvell XScale PXA2xx CPU you
+	  can enable its onboard serial ports by enabling this option.
+
 endmenu

include/configs/colibri_pxa270.h

@@ -43,7 +43,6 @@
 /*
  * Serial Console Configuration
  */
-#define	CONFIG_PXA_SERIAL
 #define	CONFIG_FFUART			1
 #define CONFIG_CONS_INDEX		3
 #define	CONFIG_BAUDRATE			115200

include/configs/h2200.h

@@ -107,8 +107,6 @@
 /*
  * Serial port
  */
-
-#define CONFIG_PXA_SERIAL
 #define CONFIG_FFUART
 #define CONFIG_CONS_INDEX		3
 

include/configs/zipitz2.h

@@ -49,7 +49,6 @@
  * Serial Console Configuration
  * STUART - the lower serial port on Colibri board
  */
-#define	CONFIG_PXA_SERIAL
 #define	CONFIG_STUART			1
 #define CONFIG_CONS_INDEX		2
 #define	CONFIG_BAUDRATE			115200

scripts/config_whitelist.txt

@@ -3740,7 +3740,6 @@ CONFIG_PWM_IMX
 CONFIG_PXA_LCD
 CONFIG_PXA_MMC_GENERIC
 CONFIG_PXA_PWR_I2C
-CONFIG_PXA_SERIAL
 CONFIG_PXA_STD_I2C
 CONFIG_PXA_VGA
 CONFIG_PXA_VIDEO