Staging: line6: 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/line6/Makefile

 obj-$(CONFIG_LINE6_USB)		+= line6usb.o
 
-line6usb-objs := 		\
+line6usb-y := 		\
 		audio.o		\
 		capture.o	\
 		control.o	\