mainboard/intel/galileo: Add GPIO initialization

Add Kconfig to configure coreboot for a specific Galileo board.
Configure the GPIOs for the specific Galileo board.

TEST=Build and run on Galileo Gen2

Change-Id: I992460d506b5543915c27f6a531da4b1a53d6505
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/14826
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/intel/galileo/Kconfig b/src/mainboard/intel/galileo/Kconfig
index f89232f..6381ae8 100644
--- a/src/mainboard/intel/galileo/Kconfig
+++ b/src/mainboard/intel/galileo/Kconfig
@@ -34,4 +34,13 @@
 	string
 	default "Intel"
 
+config GALILEO_GEN2
+	bool "Board generation: GEN1 (n) or GEN2 (y)"
+	default y
+	help
+	  The coreboot binary will configure only one generation of the Galileo
+	  board since coreboot can not determine the board generation at
+	  runtime.  Select which generation of the Galileo that coreboot
+	  should initialize.
+
 endif # BOARD_INTEL_QUARK