Staging: xgifb: 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/xgifb/Makefile

 obj-$(CONFIG_FB_XGI)  += xgifb.o
 
-xgifb-objs := XGI_main_26.o XGI_accel.o vb_init.o vb_setmode.o vb_util.o vb_ext.o
+xgifb-y := XGI_main_26.o XGI_accel.o vb_init.o vb_setmode.o vb_util.o vb_ext.o