gallium: Add Renesas rzg2l-du DRM entry point
What does this MR do and why?
gallium: Add Renesas rzg2l-du DRM entry point
RZ/{G2L,G2LC,V2L} SoCs implements an ARM Mali-G31[1]. Add an entry point
for Renesas rzg2l-du DRM vendor, so mesa can be used with it.
[1] https://lore.kernel.org/all/20211208104026.421-3-biju.das.jz@bp.renesas.com/
The mainline driver is available here [2]
[2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20240223&id=768e9e61b3b99191d8fe1aead6e71f551738b5c4
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>