drm/xe: Fix bo leak in intel_fb_bo_framebuffer_init

drm/xe: Fix bo leak in intel_fb_bo_framebuffer_init

Add a unreference bo in the error path, to prevent leaking a bo ref.

Return 0 on success to clarify the success path.

Signed-off-by: Maarten Lankhorst <[email protected]>
Fixes: 44e694958b95 ("drm/xe/display: Implement display support")
Cc: <[email protected]> # v6.8+
Reviewed-by: Nirmoy Das <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit a2f3d731be3893e730417ae3190760fcaffdf549)
Signed-off-by: Lucas De Marchi <[email protected]>