video: driver: add enumerate format support

Add below configuration
- format enumeration
- set format for encoder
- get inst capabilities based on codec from core

Change-Id: I2484056ae688cf7b634c5137631197a83c382950
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>

driver/vidc/inc/msm_venc.h

@@ -9,6 +9,9 @@
 #include "msm_vidc_core.h"
 #include "msm_vidc_inst.h"
 
+int msm_venc_s_fmt(struct msm_vidc_inst *inst, struct v4l2_format *f);
+int msm_venc_g_fmt(struct msm_vidc_inst *inst, struct v4l2_format *f);
+int msm_venc_enum_fmt(struct msm_vidc_inst *inst, struct v4l2_fmtdesc *f);
 int msm_venc_inst_init(struct msm_vidc_inst *inst);
 int msm_venc_ctrl_init(struct msm_vidc_inst *inst);