[PATCH 4.9 157/206] [media] staging: media: davinci_vpfe: unlock on error in vpfe_reqbufs()

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Dan Carpenter commit c4a407b91f4b644145492e28723f9f880efb1da0 upstream. We should unlock before returning this error code in vpfe_reqbufs(). Fixes: 622897da67b3

[PATCH 4.9 157/206] [media] staging: media: davinci_vpfe: unlock on error in vpfe_reqbufs()

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Dan Carpenter commit c4a407b91f4b644145492e28723f9f880efb1da0 upstream. We should unlock before returning this error code in vpfe_reqbufs(). Fixes: 622897da67b3 ("[media] davinci: vpfe: add