Blackfin: bf537-stamp: fix NAND resources

The NAND platform driver expects the registers to have a "mem"
resource type rather than "io".
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

arch/blackfin/mach-bf537/boards/stamp.c

@@ -418,7 +418,7 @@ static struct platform_nand_data bfin_plat_nand_data = {
 static struct resource bfin_plat_nand_resources = {
 	.start = 0x20212000,
 	.end   = 0x20212000 + (1 << MAX(BFIN_NAND_PLAT_CLE, BFIN_NAND_PLAT_ALE)),
-	.flags = IORESOURCE_IO,
+	.flags = IORESOURCE_MEM,
 };
 
 static struct platform_device bfin_async_nand_device = {