[media] Fix some Makefile rules
On a few places, := were using instead of +=, causing drivers to
not compile.
While here, standardize the usage of += on all cases where multiple
lines are needed, and for obj-y/obj-m targets, and := when just one
line is needed, on <module>-obj rules.
Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Identified-by: Antti Polosaari <crope@iki.fi>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/Makefile b/drivers/media/usb/Makefile
index 63e37bb..7f51d7e 100644
--- a/drivers/media/usb/Makefile
+++ b/drivers/media/usb/Makefile
@@ -3,8 +3,8 @@
#
# DVB USB-only drivers
-obj-y := ttusb-dec/ ttusb-budget/ dvb-usb/ dvb-usb-v2/ siano/ b2c2/
-obj-y := zr364xx/ stkwebcam/ s2255/
+obj-y += ttusb-dec/ ttusb-budget/ dvb-usb/ dvb-usb-v2/ siano/ b2c2/
+obj-y += zr364xx/ stkwebcam/ s2255/
obj-$(CONFIG_USB_VIDEO_CLASS) += uvc/
obj-$(CONFIG_USB_GSPCA) += gspca/