drm/i915: Fix BO alloc flags

drm/i915: Fix BO alloc flags

I915_BO_ALLOC_NOTHP must be added to the I915_BO_ALLOC_FLAGS mask in
order to pass GEM_BUG_ON() valid flags checks.

v2:
- Add Tvrtko's A-b

Reported-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Closes: https://lore.kernel.org/intel-gfx/d73adfa8-d61b-46b3-9385-dde53d8db8ad@intel.com/
Fixes: a8a9a590221c ("drm/i915: Use huge tmpfs mountpoint helpers")
Suggested-by: Tvrtko Ursulin <tursulin@ursulin.net>
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Acked-by: Tvrtko Ursulin <tursulin@ursulin.net>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Link: https://patch.msgid.link/20251210143617.712808-1-loic.molinari@collabora.com
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>