drm/i915: Use might_alloc()

This maybe uses lockdep through the fs_reclaim annotations.

Signed-off-by: Bernard Zhao <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/i915_request.c

···
 	u32 seqno;
 	int ret;
 
-	might_sleep_if(gfpflags_allow_blocking(gfp));
+	might_alloc(gfp);
 
 	/* Check that the caller provided an already pinned context */
 	__intel_context_pin(ce);