qcacld-3.0: Replace target_lock with ce_index_lock

Target_lock was a global lock for all target and copy engine data
structure access. Replacing target_lock with a per copy engine
lock permits paralel completion handling for different copy engines.

Change-Id: I9c09d557c85f9e48beafe5e3f936e105183ddd3f
CRs-Fixed: 941355

core/hif/inc/hif.h

@@ -290,7 +290,6 @@ struct ol_softc {
 	 * Guard changes to Target HW state and to software
 	 * structures that track hardware state.
 	 */
-	cdf_spinlock_t target_lock;
 	unsigned int ce_count;  /* Number of Copy Engines supported */
 	struct CE_state *ce_id_to_state[CE_COUNT_MAX];  /* CE id to CE_state */
 #ifdef FEATURE_NAPI