soc/intel/{cannonlake,skylake}: Add active default value for UART_FOR_CONSOLE

This patch to avoid build bot hang issue due to no
active default value for UART_FOR_CONSOLE kconfig
option.

Change-Id: I70ca5dc6c4bde6a119ad59d8c58955c96c042198
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/21287
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/soc/intel/skylake/Kconfig b/src/soc/intel/skylake/Kconfig
index 7a3c3a6..4927eac 100644
--- a/src/soc/intel/skylake/Kconfig
+++ b/src/soc/intel/skylake/Kconfig
@@ -203,6 +203,7 @@
 config UART_FOR_CONSOLE
 	int "Index for LPSS UART port to use for console"
 	default 2 if DRIVERS_UART_8250MEM
+	default 0
 	help
 	    Index for LPSS UART port to use for console:
 	    0 = LPSS UART0, 1 = LPSS UART1, 2 = LPSS UART2