[D18] add 8GB RAM size support

board/seco/imx8mp_d18/spl.c

@@ -115,10 +115,22 @@ void spl_dram_init(void)
 	if(D18_IS_8GB) {
 		printf("D18 is 8GB\n");
 		/* DDR Parameter */
-		dram_timing.ddrc_cfg[6].val  = 0x61027f10;
+		dram_timing.ddrc_cfg[6].val = 0x7027f90;
+		dram_timing.ddrc_cfg[7].val = 0x790;
+		dram_timing.ddrc_cfg[20].val = 0x502;
+		dram_timing.ddrc_cfg[37].val = 0x799;
+		dram_timing.ddrc_cfg[38].val = 0x9121b1c;
 		dram_timing.ddrc_cfg[39].val = 0x18;
 		dram_timing.ddrc_cfg[44].val = 0x7070707;
 		dram_timing.ddrc_cfg[45].val = 0xf07;
+		dram_timing.ddrc_cfg[73].val = 0x302;
+		dram_timing.ddrc_cfg[82].val = 0x599;
+		dram_timing.ddrc_cfg[98].val = 0x302;
+		dram_timing.ddrc_cfg[107].val = 0x599;
+		/* PHY init engine */
+		dram_timing.ddrphy_pie[480].val = 0x465;
+		dram_timing.ddrphy_pie[484].val = 0x70;
+		dram_timing.ddrphy_pie[488].val = 0x1c;
 	}
 
 	ddr_init(&dram_timing);