video: driver: amend stop and last flag processing

- do not ignore last flag buffer in last flag not allowed
  case also
- ignore stop command if input port is not streaming
  instead of returning -EBUSY error.
- defer input port settings change in few states instead of
  ignoring it.

Change-Id: I705f0c8ae2da899a5d262f6246aa65de5591ac26
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>

driver/vidc/inc/msm_vidc_driver.h

@@ -276,12 +276,12 @@ void put_inst(struct msm_vidc_inst *inst);
 bool msm_vidc_allow_s_fmt(struct msm_vidc_inst *inst, u32 type);
 bool msm_vidc_allow_s_ctrl(struct msm_vidc_inst *inst, u32 id);
 bool msm_vidc_allow_reqbufs(struct msm_vidc_inst *inst, u32 type);
-bool msm_vidc_allow_stop(struct msm_vidc_inst *inst);
+enum msm_vidc_allow msm_vidc_allow_stop(struct msm_vidc_inst *inst);
 bool msm_vidc_allow_start(struct msm_vidc_inst *inst);
 bool msm_vidc_allow_streamon(struct msm_vidc_inst *inst, u32 type);
 bool msm_vidc_allow_streamoff(struct msm_vidc_inst *inst, u32 type);
 bool msm_vidc_allow_qbuf(struct msm_vidc_inst *inst);
-bool msm_vidc_allow_input_psc(struct msm_vidc_inst *inst);
+enum msm_vidc_allow msm_vidc_allow_input_psc(struct msm_vidc_inst *inst);
 bool msm_vidc_allow_last_flag(struct msm_vidc_inst *inst);
 int msm_vidc_state_change_streamon(struct msm_vidc_inst *inst, u32 type);
 int msm_vidc_state_change_streamoff(struct msm_vidc_inst *inst, u32 type);