V4L/DVB (4411): Fix minor errors in build files

In pwc Kconfig, change 'depends' to 'depends on'
In dvb-core Makefile, change '=' to ':='

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/pwc/Kconfig b/drivers/media/video/pwc/Kconfig
index 697145e..8fdf710 100644
--- a/drivers/media/video/pwc/Kconfig
+++ b/drivers/media/video/pwc/Kconfig
@@ -30,7 +30,7 @@
 
 config USB_PWC_DEBUG
 	bool "USB Philips Cameras verbose debug"
-	depends USB_PWC
+	depends on USB_PWC
 	help
 	  Say Y here in order to have the pwc driver generate verbose debugging
 	  messages.