qcacld-3.0: Fix names for lim_process_assoc_req_frame.c

This patch fixes:
1) Fixes variable names as per linux kernel coding guidelines.
2) Removes PELOG definitions.
3) Fixes few of long debug prints.
4) Fixes function headers
for file lim_process_assoc_req_frame.c. This patch is then used as
base for reindentation of function lim_process_assoc_req_frame()

Change-Id: I5d4a39356b4555789ca9119f54a54766594b26c3
CRs-Fixed: 824222