skylake: fix serial port with new code base

Many Kconfig options changed in coreboot.org since
skylake was first started. Fix Kconfig option name
changes, and also provide a common option, UART_DEBUG
that can be selected to select all the necessary
options.

Note: It's still a requirement to manually unset the
      8250IO option because that's unconditionally set.

BUG=chrome-os-partner:43419
BUG=chrome-os-partner:43463
BRANCH=None
TEST=Built glados. Booted into kernel. Kernel reboots somewhere.

Original-Change-Id: I9e6549ea0f1d6b9ffe64a73856ec87b5bc7b7091
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/289951
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

Change-Id: I0e6b492d7279cc35d4fb3ac17fd727177adce39d
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11172
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/soc/intel/skylake/Kconfig

@@ -188,12 +188,16 @@ config SMM_TSEG_SIZE
 	hex
 	default 0x800000
 
-config TTYS0_BASE
-	hex
-	default 0xfe034000
-
 config VGA_BIOS_ID
 	string
 	default "8086,0406"
 
+config UART_DEBUG
+	bool "Enable UART debug port."
+	default y if CONSOLE_SERIAL
+	default n
+	select DRIVERS_UART
+	select DRIVERS_UART_8250MEM
+	select DRIVERS_UART_8250MEM_32
+
 endif