[PATCH] Rename vprintk define in bttpvp.h

Rename the (apparently) bttv intern #define vprintk to verbprintk to
resolve a name clash.

Reason: vprintk() is defined in include/linux/kernel.h similar to printk
but with a va_list argument.

(akpm: I changed it to bttv_printk)

Cc: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>