pvr: Improvements for pvr_cmd_*() macros
Motivated by comments on !17252 (closed); the pvr_cmd_struct()
macro adds nothing of value over just using PVRX()
directly.
Additionally there is no use for pvr_cmd_pack()
outside pvr_csb.h
, so it's marked as internal.
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Edited by Matt Coster