Staging: rtl8712: Makefile: replace the use of <module>-objs with <module>-y

Changed <module>-objs to <module>-y in Makefile.
Signed-off-by: Tracey Dent <tdent48227@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rtl8712/Makefile

-r8712u-objs :=				\
+r8712u-y :=				\
 		rtl871x_cmd.o		\
 		rtl8712_cmd.o		\
 		rtl871x_security.o	\