imx8mq_evk: Applying default LPDDR4 script for B2

Both i.MX8MQ B1 and B2 should use default LPDDR4 script, while B0
has another dedicated script.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/board/freescale/imx8mq_evk/spl.c b/board/freescale/imx8mq_evk/spl.c
index 8275358..e8e0efe 100644
--- a/board/freescale/imx8mq_evk/spl.c
+++ b/board/freescale/imx8mq_evk/spl.c
@@ -36,7 +36,7 @@
 static void spl_dram_init(void)
 {
 	/* ddr init */
-	if ((get_cpu_rev() & 0xfff) == CHIP_REV_2_1)
+	if (soc_rev() >= CHIP_REV_2_1)
 		ddr_init(&dram_timing);
 	else
 		ddr_init(&dram_timing_b0);