ARM: versatile: 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: Albert Aribaud <albert.u.boot@aribaud.net>

board/armltd/versatile/versatile.c

@@ -94,7 +94,7 @@ int misc_init_r (void)
 int dram_init (void)
 {
 	/* dram_init must store complete ramsize in gd->ram_size */
-	gd->ram_size = get_ram_size((volatile void *)CONFIG_SYS_SDRAM_BASE,
+	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
 				PHYS_SDRAM_1_SIZE);
 	return 0;
 }