soc/mediatek/mt8196: Set DRAMC_PARAM_HEADER_VERSION to 4

Set DRAMC_PARAM_HEADER_VERSION to 4 for aligning with DRAM blob.

TEST=Bootup pass.
BUG=b:317009620

Change-Id: I45c9ea97e3c015bab7145116e2074b44df5e955c
Signed-off-by: Crystal Guo <crystal.guo@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85502
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8196/include/soc/dramc_param.h

@@ -13,7 +13,7 @@
 #include <stdint.h>
 #include <sys/types.h>
 
-#define DRAMC_PARAM_HEADER_VERSION 3
+#define DRAMC_PARAM_HEADER_VERSION 4
 
 struct sdram_params {
 	/* rank, cbt */