staging: brcmfmac: Consolidate debugging macros

Convert multiple BRCMF_<debug_level> macros to a single
brcmf_dbg(level, fmt, ...) macro.

Remove the now unnecessary double parentheses in the uses
of the old macros when converting to brcmf_dbg.

Delete all uses of "%s: [fmt]", __func__, args... and move
the "%s: ", __func__ to the macro for consistency.

Coalesce long formats.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>