drm: Use XArray instead of IDR for minors

[ Upstream commit 5fbca8b4 ]

IDR is deprecated, and since XArray manages its own state with internal
locking, it simplifies the locking on DRM side.
Additionally, don't use the IRQ-safe variant, since operating on drm
minor is not done in IRQ context.

Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Acked-by: James Zhu <James.Zhu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240823163048.2676257-2-michal.winiarski@intel.com


Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>