video: driver: implement TRY_FMT for encoder and decoder

Any video device which supports capture multiplanar buf type
should implement VIDIOC_TRY_FMT.

Fixes: v4l2-compliance: testTryFormats (VIDIOC_TRY_FMT).

Change-Id: Id7ec171115c9374c6173fcf74a609382c3acf2d0
Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>

driver/vidc/inc/msm_vidc.h

@@ -19,6 +19,7 @@ int msm_vidc_close(void *instance);
 int msm_vidc_suspend(int core_id);
 int msm_vidc_querycap(void *instance, struct v4l2_capability *cap);
 int msm_vidc_enum_fmt(void *instance, struct v4l2_fmtdesc *f);
+int msm_vidc_try_fmt(void *instance, struct v4l2_format *f);
 int msm_vidc_s_fmt(void *instance, struct v4l2_format *f);
 int msm_vidc_g_fmt(void *instance, struct v4l2_format *f);
 int msm_vidc_s_selection(void* instance, struct v4l2_selection* s);