V4L/DVB (7047): fix broken build when CONFIG_USB_SI470X is set

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/radio/Makefile

@@ -21,6 +21,6 @@ obj-$(CONFIG_RADIO_GEMTEK_PCI) += radio-gemtek-pci.o
 obj-$(CONFIG_RADIO_TRUST) += radio-trust.o
 obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o
 obj-$(CONFIG_USB_DSBR) += dsbr100.o
-obj-$(CONFIG_USB_SI470X) := radio-si470x.o
+obj-$(CONFIG_USB_SI470X) += radio-si470x.o
 
 EXTRA_CFLAGS += -Isound