backports: remove brcmsmac / brcmutil Makefile patches

backports: remove brcmsmac / brcmutil Makefile patches

These are now upstream thanks to commit 8e8d4ff0 on
next-20130415.

commit 8e8d4ff051672d4a2939e7d6925c4acd234b0220
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Apr 11 16:15:28 2013 +0200

    brcm80211: simplify makefiles

    This came up during my backporting work but it seems
    perfectly appropriate for the kernel as well.

    Signed-off-by: Johannes Berg <johannes.berg@intel.com>
    Acked-by: Arend van Spriel <arend@broadcom.com>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>