ARM: OMAP2+: SmartReflex: fix return value check in sr_dev_init()

In case of error, the function voltdm_lookup() returns NULL
not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: NJean Pihet <j-pihet@ti.com>
Signed-off-by: NKevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/sr_device.c

@@ -123,7 +123,7 @@ static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
 	sr_data->senp_mod = 0x1;
 
 	sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name);
-	if (IS_ERR(sr_data->voltdm)) {
+	if (!sr_data->voltdm) {
 		pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
 			__func__, sr_dev_attr->sensor_voltdm_name);
 		goto exit;