mainboard: Make OemCustomize.c available at romstage

As part of moving AGESA calls from bootblock to romstage, OemCustomize.c
of all boards using stoneyridge must be available at romstage.

BUG=b:74236170
TEST=Build grunt and kahlee, actual test will be performed at a later patch.

Change-Id: Ide9efdbff6a07c670034391c0d62e8b74fa5c02b
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/25528
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/amd/gardenia/Makefile.inc

@@ -18,6 +18,7 @@ bootblock-y += bootblock/OemCustomize.c
 bootblock-y += gpio.c
 
 romstage-y += BiosCallOuts.c
+romstage-y += bootblock/OemCustomize.c
 romstage-y += OemCustomize.c
 
 ramstage-y += BiosCallOuts.c

src/mainboard/google/kahlee/variants/baseboard/Makefile.inc

@@ -18,6 +18,7 @@ bootblock-y += OemCustomize.c
 
 verstage-y += tpm_tis.c
 
+romstage-y += OemCustomize.c
 romstage-y += gpio.c
 romstage-y += memory.c
 romstage-y += tpm_tis.c

src/mainboard/google/kahlee/variants/kahlee/Makefile.inc

@@ -16,6 +16,7 @@
 bootblock-y += gpio.c
 bootblock-y += OemCustomize.c
 
+romstage-y += OemCustomize.c
 romstage-y += gpio.c
 romstage-y += memory.c