drm: Remove unused function rcar_cmm_write

The function are defined in the rcar_cmm.c file, but not called
elsewhere, so delete the unused function.

drivers/gpu/drm/renesas/rcar-du/rcar_cmm.c:35:19

drm: Remove unused function rcar_cmm_write

The function are defined in the rcar_cmm.c file, but not called
elsewhere, so delete the unused function.

drivers/gpu/drm/renesas/rcar-du/rcar_cmm.c:35:19: warning: unused function 'rcar_cmm_read'.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9364
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20240619075436.86407-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>

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drm: rcar-du: Fix memory leak in rcar_du_vsps_init()

The rcar_du_vsps_init() doesn't free the np allocated by
of_parse_phandle_with_fixed_args() for the non-error case.

Fix memory leak for the non-

drm: rcar-du: Fix memory leak in rcar_du_vsps_init()

The rcar_du_vsps_init() doesn't free the np allocated by
of_parse_phandle_with_fixed_args() for the non-error case.

Fix memory leak for the non-error case.

While at it, replace the label 'error'->'done' as it applies to non-error
case as well and update the error check condition for rcar_du_vsp_init()
to avoid breakage in future, if it returns positive value.

Fixes: 3e81374e2014 ("drm: rcar-du: Support multiple sources from the same VSP")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20231116122424.80136-1-biju.das.jz@bp.renesas.com
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>

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