Staging: rtl8187x: Use %pM for mac address output

Uncompiled.  Doesn't currently build anyway.

Converted MAC_FMT to %pM
Converted some %02x%02x%02x%02x%02x%02x to %pm
Converted MAC_ARG to direct use
Removed MAC_FMT and MAC_ARG macros

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