soc/mediatek/mt8188: Add DRAM full calibration support

- Use common SoC drivers for DRAM calibration support.
- Remove emi.h because sdram_size() is already declared in
  common/include/soc/emi.h.
- Add dramc_param.h and dramc_soc.h to prepare for implementation of
  DRAM full calibration.

TEST=build pass
BUG=b:233720142

Signed-off-by: Xi Chen <xixi.chen@mediatek.com>
Change-Id: I2f88d971fe861cbd09cc86c8a5a1fb531bfe78d7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66277
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8188/emi.c b/src/soc/mediatek/mt8188/emi.c
index 7c9ca8e157..eebc0d4bf2 100644
--- a/src/soc/mediatek/mt8188/emi.c
+++ b/src/soc/mediatek/mt8188/emi.c
@@ -11,3 +11,8 @@ size_t sdram_size(void)
 {
 	return (size_t)4 * GiB;
 }
+
+void mt_set_emi(struct dramc_param *dparam)
+{
+	/* Do nothing */
+}