drm/i915/gem: Call i915_gem_flush_free_objects() in i915_gem_dumb_create()

This doesn't really fix anything serious since the chances of a client
creating and destroying a mass of dumb BOs is pretty low.  However, it
is called by the other two create IOCTLs to garbage collect old objects.
Call it here too for consistency.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210723172142.3273510-4-jason@jlekstrand.net

drivers/gpu/drm/i915/gem/i915_gem_create.c

@@ -151,6 +151,8 @@ i915_gem_dumb_create(struct drm_file *file,
 	if (args->pitch < args->width)
 		return -EINVAL;
 
+	i915_gem_flush_free_objects(i915);
+
 	args->size = mul_u32_u32(args->pitch, args->height);
 
 	mem_type = INTEL_MEMORY_SYSTEM;