media: rzg2l-cru: Simplify handling of supported formats

media: rzg2l-cru: Simplify handling of supported formats

Refactor the handling of supported formats in the RZ/G2L CRU driver by
adding `pixelformat` and `bpp` members to the `rzg2l_cru_ip_format`
structure.

New helper functions, `rzg2l_cru_ip_format_to_fmt()` and
`rzg2l_cru_ip_index_to_fmt()`, are added to retrieve format information
based on 4CC format and index, respectively. These helpers allow the
removal of the now redundant `rzg2l_cru_format_from_pixel()` function.

The new helpers are used in `rzg2l_cru_format_bytesperline()`,
`rzg2l_cru_format_align()`, and `rzg2l_cru_enum_fmt_vid_cap()`,
streamlining the handling of supported formats and improving code
maintainability.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20241018133446.223516-14-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>