em28xx and ivtv should depend on PCI

.. because video-buf.c requires PCI, and VIDEO_EM28XX selects it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/media/video/em28xx/Kconfig

 config VIDEO_EM28XX
 	tristate "Empia EM2800/2820/2840 USB video capture support"
-	depends on VIDEO_V4L1 && I2C
+	depends on VIDEO_V4L1 && I2C && PCI
 	select VIDEO_BUF
 	select VIDEO_TUNER
 	select VIDEO_TVEEPROM

drivers/media/video/ivtv/Kconfig

 config VIDEO_IVTV
 	tristate "Conexant cx23416/cx23415 MPEG encoder/decoder support"
-	depends on VIDEO_V4L1 && VIDEO_V4L2 && USB && I2C && EXPERIMENTAL
+	depends on VIDEO_V4L1 && VIDEO_V4L2 && USB && I2C && EXPERIMENTAL && PCI
 	select FW_LOADER
 	select VIDEO_TUNER
 	select VIDEO_TVEEPROM