V4L/DVB (13412): SMS_SIANO_MDTV should depend on HAS_DMA

When building for Sun 3:

drivers/built-in.o: In function `smscore_unregister_device':
drivers/media/dvb/siano/smscoreapi.c:723: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `smscore_register_device':
drivers/media/dvb/siano/smscoreapi.c:365: undefined reference to `dma_alloc_coherent'
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/siano/Kconfig

@@ -4,7 +4,7 @@
 
 config SMS_SIANO_MDTV
 	tristate "Siano SMS1xxx based MDTV receiver"
-	depends on DVB_CORE && INPUT
+	depends on DVB_CORE && INPUT && HAS_DMA
 	---help---
 	  Choose Y or M here if you have MDTV receiver with a Siano chipset.