nb/intel/pineview: Move to C_ENVIRONMENT_BOOTBLOCK

This adds a file i82801gx/bootblock_gcc.c since other targets that
don't yet C_ENVIRONMENT_BOOTBLOCK still use the romcc compiled
bootblock.c.

Tested on Foxconn D41S.

Change-Id: I7e74838b0d5e9c192082084cfd9821996f0e4c50
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30939
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/northbridge/intel/pineview/Makefile.inc

@@ -16,6 +16,8 @@
 
 ifeq ($(CONFIG_NORTHBRIDGE_INTEL_PINEVIEW),y)
 
+bootblock-y += bootblock.c
+
 ramstage-y += ram_calc.c
 ramstage-y += northbridge.c
 ramstage-y += gma.c