staging: vchiq_core: Drop vchiq_pagelist.h

vchiq_pagelist.h only defines one struct and a couple of macros.
It can be merged with vchiq_core since all the pagelist related
function helpers are now in vchiq_core for bulk transfers.

Move the struct and related macros to vchiq_core header and drop
vchiq_pagelist.h.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/20240919142130.1331495-4-umang.jain@ideasonboard.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>