video: driver: optimize buffer pool implementation

- Maintain free & busy pool to track buffers separately
- track double-free cases during msm_memory_free()
- track memory leak, by checking busy pool buffer count.
  it is expected to be zero at the end of a session.
- maintain common api's to init, alloc, free, destroy
  for all below buffer types.
    - struct msm_vidc_buffer
    - struct msm_vidc_alloc
    - struct msm_vidc_map
    - struct msm_vidc_timestamp.

Change-Id: Ib8655047c3883ea6601344661058d7a629ffd5bd
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>

driver/vidc/inc/msm_vidc_inst.h

@@ -7,6 +7,7 @@
 #define _MSM_VIDC_INST_H_
 
 #include "msm_vidc_internal.h"
+#include "msm_vidc_memory.h"
 #include "hfi_property.h"
 
 struct msm_vidc_inst;
@@ -27,13 +28,6 @@ struct msm_vidc_session_ops {
 	int (*extra_count)(struct msm_vidc_inst *inst, enum msm_vidc_buffer_type type);
 };
 
-struct msm_vidc_pool_info {
-	struct msm_vidc_pool            allocations;
-	struct msm_vidc_pool            mappings;
-	struct msm_vidc_pool            buffers;
-	struct msm_vidc_pool            timestamps;
-};
-
 struct msm_vidc_allocations_info {
 	struct msm_vidc_allocations     bin;
 	struct msm_vidc_allocations     arp;
@@ -119,7 +113,7 @@ struct msm_vidc_inst {
 	struct msm_vidc_rectangle          compose;
 	struct msm_vidc_power              power;
 	struct vidc_bus_vote_data          bus_data;
-	struct msm_vidc_pool_info          pool;
+	struct msm_memory_pool             pool[MSM_MEM_POOL_MAX];
 	struct msm_vidc_buffers_info       buffers;
 	struct msm_vidc_mappings_info      mappings;
 	struct msm_vidc_allocations_info   allocations;