ARM: plat-samsung: use Kconfig choice for debug UART selection

Now that the DEBUG_LL UART can be selected by a Kconfig choice, convert
the Samsung UART selection to use a set of bools rather than an int.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

arch/arm/Kconfig.debug

@@ -128,6 +128,39 @@ choice
 		  Say Y here if you want the debug print routines to direct
 		  their output to the second serial port on these devices.
 
+	config DEBUG_S3C_UART0
+		depends on PLAT_SAMSUNG
+		bool "Use S3C UART 0 for low-level debug"
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to UART 0. The port must have been initialised
+		  by the boot-loader before use.
+
+		  The uncompressor code port configuration is now handled
+		  by CONFIG_S3C_LOWLEVEL_UART_PORT.
+
+	config DEBUG_S3C_UART1
+		depends on PLAT_SAMSUNG
+		bool "Use S3C UART 1 for low-level debug"
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to UART 1. The port must have been initialised
+		  by the boot-loader before use.
+
+		  The uncompressor code port configuration is now handled
+		  by CONFIG_S3C_LOWLEVEL_UART_PORT.
+
+	config DEBUG_S3C_UART2
+		depends on PLAT_SAMSUNG
+		bool "Use S3C UART 2 for low-level debug"
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to UART 2. The port must have been initialised
+		  by the boot-loader before use.
+
+		  The uncompressor code port configuration is now handled
+		  by CONFIG_S3C_LOWLEVEL_UART_PORT.
+
 endchoice
 
 config EARLY_PRINTK
@@ -146,16 +179,4 @@ config OC_ETM
 	  buffer driver that will allow you to collect traces of the
 	  kernel code.
 
-config DEBUG_S3C_UART
-	depends on PLAT_SAMSUNG
-	int "S3C UART to use for low-level debug"
-	default "0"
-	help
-	  Choice for UART for kernel low-level using S3C UARTS,
-	  should be between zero and two. The port must have been
-	  initialised by the boot-loader before use.
-
-	  The uncompressor code port configuration is now handled
-	  by CONFIG_S3C_LOWLEVEL_UART_PORT.
-
 endmenu

arch/arm/plat-samsung/Kconfig

@@ -367,4 +367,11 @@ config SAMSUNG_PD
 	help
 	  Say Y here if you want to control Power Domain by Runtime PM.
 
+config DEBUG_S3C_UART
+	depends on PLAT_SAMSUNG
+	int
+	default "0" if DEBUG_S3C_UART0
+	default "1" if DEBUG_S3C_UART1
+	default "2" if DEBUG_S3C_UART2
+
 endif