drm/amdgpu/userq: use consistent function naming

s/userqueue/userq/

1. remove the mix of amdgpu_userqueue and amdgpu_userq
2. to be consistent with other amdgpu_userq_fence.c
3. it's shorter

Reviewed-by: Prike Liang <Prike.Liang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.h

@@ -27,7 +27,7 @@
 
 #include <linux/types.h>
 
-#include "amdgpu_userqueue.h"
+#include "amdgpu_userq.h"
 
 struct amdgpu_userq_fence {
 	struct dma_fence base;