video: driver: initial state machine changes

- hierarchical state model which comprises of
  top level states and sub states
- top level states include OPEN, CLOSE, ERROR,
  INPUT_STREAMING, OUTPUT_STREAMING, STREAMING.
- sub states include DRAIN, DRC, DRAIN_LAST_BUFFER,
  DRC_LAST_BUFFER, INPUT_PAUSE, OUTPUT_PAUSE.
- follows deterministic approach for key sequences
  like DRC, DRAIN and last flag handling i.e none
  of these events are ignored or discarded.
- removal of auto start of firmware input port as
  part of ipsc handling.
- introduction of hfi commands for host controlled
  PAUSE and RESUME of firmware ports.
- introduction of information last flag packets
  for DRC and DRAIN when FW has insufficient
  output buffers.

Change-Id: Ie8c8f44af464d06f5a7bb76822f749c9874f869a
Signed-off-by: Darshana Patil <quic_darshana@quicinc.com>

driver/vidc/inc/hfi_property.h

@@ -607,6 +607,10 @@ enum hfi_saliency_type {
 
 #define HFI_INFO_VCODEC_RESET                                   0x06000005
 
+#define HFI_INFO_HFI_FLAG_DRAIN_LAST                            0x06000006
+
+#define HFI_INFO_HFI_FLAG_PSC_LAST                              0x06000007
+
 #define HFI_INFORMATION_END                                     0x06FFFFFF
 
 #endif //__H_HFI_PROPERTY_H__