rockchip: rk3399: Use tFC value instead of tRFC value

This fixes code that set a tFC value in a register using the tRFC
value instead.
Signed-off-by: Derek Basehore <dbasehore@chromium.org>

plat/rockchip/rk3399/drivers/dram/dfs.c

@@ -1183,7 +1183,8 @@ static void gen_rk3399_pi_params_f0(struct timing_related_config *timing_config,
 		mmio_clrsetbits_32(PI_REG(i, 148), 0xffff << 16,
 				   pdram_timing->mr[2] << 16);
 		/* PI_156 PI_TFC_F0:RW:0:10 */
-		mmio_clrsetbits_32(PI_REG(i, 156), 0x3ff, pdram_timing->trfc);
+		mmio_clrsetbits_32(PI_REG(i, 156), 0x3ff,
+				   pdram_timing->tfc_long);
 		/* PI_158 PI_TWR_F0:RW:24:6 */
 		mmio_clrsetbits_32(PI_REG(i, 158), 0x3f << 24,
 				   pdram_timing->twr << 24);
@@ -1363,7 +1364,7 @@ static void gen_rk3399_pi_params_f1(struct timing_related_config *timing_config,
 		mmio_clrsetbits_32(PI_REG(i, 151), 0xffff, pdram_timing->mr[2]);
 		/* PI_156 PI_TFC_F1:RW:16:10 */
 		mmio_clrsetbits_32(PI_REG(i, 156), 0x3ff << 16,
-				   pdram_timing->trfc << 16);
+				   pdram_timing->tfc_long << 16);
 		/* PI_162 PI_TWR_F1:RW:8:6 */
 		mmio_clrsetbits_32(PI_REG(i, 162), 0x3f << 8,
 				   pdram_timing->twr << 8);

plat/rockchip/rk3399/drivers/dram/dram_spec_timing.c

@@ -666,6 +666,9 @@ static void lpddr2_get_parameter(struct timing_related_config *timing_config,
 #define LPDDR3_TADR	(20) /* ns */
 #define LPDDR3_TMRZ	(3) /* ns */
 
+/* FSP */
+#define LPDDR3_TFC_LONG	(250) /* ns */
+
 /*
  * Description: depend on input parameter "timing_config",
  *		and calculate all lpddr3
@@ -879,6 +882,9 @@ static void lpddr3_get_parameter(struct timing_related_config *timing_config,
 	pdram_timing->tadr = (LPDDR3_TADR * nmhz + 999) / 1000;
 	pdram_timing->tmrz = (LPDDR3_TMRZ * nmhz + 999) / 1000;
 	pdram_timing->tcacd = pdram_timing->tadr + 2;
+
+	/* FSP */
+	pdram_timing->tfc_long = (LPDDR3_TFC_LONG * nmhz + 999) / 1000;
 }
 
 #define LPDDR4_TINIT1	(200000) /* 200us */