uart: Redefine Kconfig options

Option DRIVERS_UART builds with support for UART hardware.
Option CONSOLE_SERIAL enables the console output for UART.

Those x86 boards that do not have serial port on SuperIO should select
NO_UART_ON_SUPERIO to disable 8250 UART for the default configuration.

Removes:
  CONSOLE_SERIAL_UART
  HAVE_UART_IO_MAPPED
  HAVE_UART_MEMORY_MAPPED

Renames:
  CONSOLE_SERIAL8250     ->  DRIVERS_UART_8250IO
  CONSOLE_SERIAL8250MEM  ->  DRIVERS_UART_8250MEM

Change-Id: Id3afa05f85c0d6849746886db8b6c2ed6c846b61
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5311
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/drivers/uart/Kconfig b/src/drivers/uart/Kconfig
index 5c9a9d1..889c69a 100644
--- a/src/drivers/uart/Kconfig
+++ b/src/drivers/uart/Kconfig
@@ -1,10 +1,19 @@
-# This should default to N and be set by SuperI/O drivers that have an UART
-config HAVE_UART_IO_MAPPED
+config DRIVERS_UART
 	bool
+	default y if CONSOLE_SERIAL
+	default n
+
+config DRIVERS_UART_8250IO
+	bool "Serial port on SuperIO"
 	depends on !ARCH_ARMV7
+	default n if NO_UART_ON_SUPERIO
 	default y if ARCH_X86
 
-config HAVE_UART_MEMORY_MAPPED
+# Select this for mainboard without SuperIO serial port.
+config NO_UART_ON_SUPERIO
+	def_bool n
+
+config DRIVERS_UART_8250MEM
 	bool
 	default n