arm: ls1021a: improve the core frequency to 1.2GHZ

Change core clock to 1.2GHz in the configurations for SD and NAND boot.

Signed-off-by: Yuan Yao <yao.yuan@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/ls1021aqds/ls102xa_rcw_sd_ifc.cfg b/board/freescale/ls1021aqds/ls102xa_rcw_sd_ifc.cfg
index 9d99bd8..f0cf9c2 100644
--- a/board/freescale/ls1021aqds/ls102xa_rcw_sd_ifc.cfg
+++ b/board/freescale/ls1021aqds/ls102xa_rcw_sd_ifc.cfg
@@ -2,13 +2,13 @@
 aa55aa55 01ee0100
 
 #enable IFC, disable QSPI and DSPI
-0608000a 00000000 00000000 00000000
+0608000c 00000000 00000000 00000000
 60000000 00407900 60040a00 21046000
 00000000 00000000 00000000 00038000
 00000000 001b7200 00000000 00000000
 
 #disable IFC, enable QSPI and DSPI
-#0608000a 00000000 00000000 00000000
+#0608000c 00000000 00000000 00000000
 #60000000 00407900 60040a00 21046000
 #00000000 00000000 00000000 00038000
 #20024800 001b7200 00000000 00000000