mb/google/geralt: Add reset.c for bootblock

VBOOT_CBFS_INTEGRATION needs board_reset in its logic. Otherwise, it
will cause a build failure.

BUG=b:294643742
TEST=build coreboot

Change-Id: Ia4b81d8add71e62707f6b5a747d270caba502174
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77118
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/geralt/Makefile.inc

@@ -3,6 +3,7 @@
 bootblock-y += memlayout.ld
 bootblock-y += bootblock.c
 bootblock-y += chromeos.c
+bootblock-$(CONFIG_VBOOT_CBFS_INTEGRATION) += reset.c
 
 verstage-y += memlayout.ld
 verstage-y += chromeos.c