Staging: wlan-ng: 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/wlan-ng/Makefile

 obj-$(CONFIG_PRISM2_USB) += prism2_usb.o
 
-prism2_usb-objs := prism2usb.o \
+prism2_usb-y := prism2usb.o \
 		p80211conv.o \
 		p80211req.o \
 		p80211wep.o \