qcacld-3.0: Remove HDD identifier staMac

The Linux Coding Style frowns upon mixed-case names so variable staMac
in hdd_get_interface_info() is not compliant. But rather than rename
it, just remove it, since its use does not really improve the code.

Change-Id: If4db592fe2b7728d7c03c1415c9d9e8aeb7c1cf2
CRs-Fixed: 2427181
1 file changed