qcacld-3.0: Rename pMac in csr misc files

Per the Linux coding style "mixed-case names are frowned upon" and
"so-called Hungarian notation [...] is brain damaged." One identifier
used extensively throughout the driver that violates both of these
tenants is "pMac." In order to be compliant with the Linux coding
style there is a campaign to rename all instances of this identifier.

For this change rename all instances of "pMac" to "mac" in:
csr_api.h
csr_support.h
csr_host_scan_roam.c
csr_roam_preauth.c

Change-Id: I941c87e308f47162e9eddd111498cf072dbcdf81
CRs-Fixed: 2355449
4 files changed