Staging: rtl8712: remove semicolon after macro

This patch fixes checkpatch.pl warning in rtl871x_mp.h file
WARNING : Macro should not use a trailing semicolon

Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>