console: Add drivers/uart

Also move UART related Kconfig options from top-level file.

Change-Id: I4e407977cff6f6506f991600c98d6d264676d3f8
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5230
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/Kconfig

@@ -292,20 +292,6 @@ config MMCONF_SUPPORT
 
 source src/console/Kconfig
 
-# This should default to N and be set by SuperI/O drivers that have an UART
-config HAVE_UART_IO_MAPPED
-	bool
-	default y if ARCH_X86
-	default n if ARCH_ARMV7
-
-config HAVE_UART_MEMORY_MAPPED
-	bool
-	default n
-
-config HAVE_UART_SPECIAL
-	bool
-	default n
-
 config HAVE_ACPI_RESUME
 	bool
 	default n