[XS] Change in coreboot[main]: mb/google/skywalker: Add DRAM calibration init entry

[Matt DeVillier (Code Review)]

Matt DeVillier has submitted this change. ( https://review.coreboot.org/c/coreboot/+/87038?usp=email )

Change subject: mb/google/skywalker: Add DRAM calibration init entry
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mb/google/skywalker: Add DRAM calibration init entry

Add DRAM calibration entry in romstage.

BUG=b:379008996
BRANCH=none
TEST=Boot up pass
3200 LPDDR5 chan0(x16) rank0: memory test pass
3200 LPDDR5 chan0(x16) rank1: memory test pass
3200 LPDDR5 chan1(x16) rank0: memory test pass
3200 LPDDR5 chan1(x16) rank1: memory test pass

Signed-off-by: Mike Lin 
Change-Id: Iabdcabefc77a262c548019e801daf5b269eaa97a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87038
Reviewed-by: Yidi Lin 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/google/skywalker/romstage.c
1 file changed, 2 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Yidi Lin: Looks good to me, approved

diff --git a/src/mainboard/google/skywalker/romstage.c b/src/mainboard/google/skywalker/romstage.c
index 7758dfa..74cfb1b 100644
--- a/src/mainboard/google/skywalker/romstage.c
+++ b/src/mainboard/google/skywalker/romstage.c
@@ -1,8 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */

#include <arch/stages.h>
+#include <soc/emi.h>

void platform_romstage_main(void)
 {
-	/* TODO: add romstage main function */
+	mtk_dram_init();
 }