V4L/DVB (5480): Fix cx88_print_irqbits calls to use ARRAY_SIZE

cx88_print_irqbits were expecting a string pointer with 32 bytes. Better 
to pass the string size and use ARRAY_SIZE on its calls.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/cx88/cx88-mpeg.c b/drivers/media/video/cx88/cx88-mpeg.c
index db98f1f..def939d 100644
--- a/drivers/media/video/cx88/cx88-mpeg.c
+++ b/drivers/media/video/cx88/cx88-mpeg.c
@@ -366,7 +366,8 @@
 
 	if (debug || (status & mask & ~0xff))
 		cx88_print_irqbits(core->name, "irq mpeg ",
-				   cx88_mpeg_irqs, status, mask);
+				   cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
+				   status, mask);
 
 	/* risc op code error */
 	if (status & (1 << 16)) {