mainboard/intel/galileo: Support bootblock in C

Initialize the GPIOs during the boot block to properly route the SOC
UART pins.

TEST=Build and run on Galileo Gen2

Change-Id: I22c24f8c83f04566a0bbd598a141a5209569a924
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/15133
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/intel/galileo/Makefile.inc

@@ -17,6 +17,9 @@ ifeq ($(CONFIG_PLATFORM_USES_FSP1_1),y)
 CPPFLAGS_common += -I$(src)/vendorcode/intel/fsp/fsp1_1/quark
 endif
 
+bootblock-y += gpio.c
+bootblock-y += reg_access.c
+
 romstage-y += gpio.c
 romstage-y += reg_access.c