[PATCH 4.2.y-ckt 160/206] am437x-vpfe: fix an uninitialized variable bug

4.2.8-ckt12 -stable review patch. If anyone has any objections, please let me know. ---8< From: Dan Carpenter commit e4bccada44c177cde31b9a236b7dfd7f76d403ed upstream. If we are doing V4L2_FIELD_NONE then

[PATCH 4.2.y-ckt 160/206] am437x-vpfe: fix an uninitialized variable bug

4.2.8-ckt12 -stable review patch. If anyone has any objections, please let me know. ---8< From: Dan Carpenter commit e4bccada44c177cde31b9a236b7dfd7f76d403ed upstream. If we are doing V4L2_FIELD_NONE then "ret" is used