MLK-20238-01 plat: imx: fix uninitialized value using

fix Coverity: CID 5243766: Uninitialized scalar variable (UNINIT)
issue.

Signed-off-by: Bai Ping <ping.bai@nxp.com>
(cherry picked from commit 9fe5f166ab303f125975482a0ed0b7d96cbccd67)
diff --git a/plat/imx/common/imx8m/ddr4_dvfs.c b/plat/imx/common/imx8m/ddr4_dvfs.c
index 951d177..a083613 100644
--- a/plat/imx/common/imx8m/ddr4_dvfs.c
+++ b/plat/imx/common/imx8m/ddr4_dvfs.c
@@ -180,7 +180,7 @@
 
 	/* 6. For DDR4 only: Perform an MRS command (using MRCTRL0 and MRCTRL1 registers) to write 0 to */
 	/* MR5[8:6] to disable RTT_PARK */
-	for (int i = i; i < num_rank; i++) {
+	for (int i = 1; i < num_rank; i++) {
 		if (mr_value[5] & 0x1C0)
 			ddr4_mr_write(5, mr_value[5] & 0xFE3F, 0, i);
 	}