IMX: scb9328: drop warnings

Drop warning: "passing argument 1 of 'get_ram_size'
discards qualifiers from pointer target type"

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Torsten Koschorrek <koschorrek@synertronixx.de>

board/scb9328/scb9328.c

@@ -40,7 +40,7 @@ int board_init (void)
 int dram_init (void)
 {
 	/* dram_init must store complete ramsize in gd->ram_size */
-	gd->ram_size = get_ram_size((volatile void *)SCB9328_SDRAM_1,
+	gd->ram_size = get_ram_size((void *)SCB9328_SDRAM_1,
 				    SCB9328_SDRAM_1_SIZE);
 
 	return 0;