ARM: mmp: fix potential NULL dereference

Fix the wrong logic: we should use || instead of &&

Cc: Leo Yan <leoy@marvell.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Yuanhan Liu <yliu.null@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

arch/arm/mach-mmp/sram.c

@@ -68,7 +68,7 @@ static int __devinit sram_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret = 0;
 
-	if (!pdata && !pdata->pool_name)
+	if (!pdata || !pdata->pool_name)
 		return -ENODEV;
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);