V4L/DVB (7594): em28xx: Fix Kconfig

Some devices have msp3400 audio decoder chip. Selects it, if em28xx.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/em28xx/Kconfig

 config VIDEO_EM28XX
-	tristate "Empia EM2800/2820/2840 USB video capture support"
+	tristate "Empia EM28xx USB video capture support"
 	depends on VIDEO_DEV && I2C && INPUT
 	select VIDEO_TUNER
 	select VIDEO_TVEEPROM
 	select VIDEO_IR
 	select VIDEO_SAA711X if VIDEO_HELPER_CHIPS_AUTO
 	select VIDEO_TVP5150 if VIDEO_HELPER_CHIPS_AUTO
+	select VIDEO_MSP3400 if VIDEO_HELPER_CHIPS_AUTO
 	---help---
 	  This is a video4linux driver for Empia 28xx based TV cards.