[media] media: davinci: vpif_display: move displaying of error to approppraite place

this patch moves the displaying out error case  "VPIF IRQ request failed\n"
when there is actual request_irq() fail.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>