soc/mediatek/mt8192: Update header version from 1.7.1 to 1.8.1

Move some structures to common folder (CB:61293), so we need to update
header version for this.

BUG=none
TEST=dram calibration pass

Signed-off-by: Ryan Chuang <ryan.chuang@mediatek.corp-partner.google.com>
Change-Id: I8cf12f4967af116eaef88c1f688567f1da9fa6e4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62549
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/soc/mediatek/mt8192/include/soc/dramc_param.h

@@ -13,7 +13,7 @@
 #include <soc/dramc_param_common.h>
 #include <soc/dramc_soc.h>
 
-#define DRAMC_PARAM_HEADER_VERSION 7
+#define DRAMC_PARAM_HEADER_VERSION 8
 
 struct sdram_params {
 	u32 rank_num;