media: vsp1: Fix WPF macro names

The WPF IRQ enable and status macros have been incorrectly named WFP.
Fix them accordingly, and update all uses of the macros.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>