amdgpu: Add new symbols to amdgpu-symbols-check

Fixes make check.

Trivial.
diff --git a/amdgpu/amdgpu-symbol-check b/amdgpu/amdgpu-symbol-check
index 9a0b36c..648db9b 100755
--- a/amdgpu/amdgpu-symbol-check
+++ b/amdgpu/amdgpu-symbol-check
@@ -24,11 +24,15 @@
 amdgpu_bo_va_op
 amdgpu_bo_wait_for_idle
 amdgpu_create_bo_from_user_mem
+amdgpu_cs_create_semaphore
 amdgpu_cs_ctx_create
 amdgpu_cs_ctx_free
+amdgpu_cs_destroy_semaphore
 amdgpu_cs_query_fence_status
 amdgpu_cs_query_reset_state
+amdgpu_cs_signal_semaphore
 amdgpu_cs_submit
+amdgpu_cs_wait_semaphore
 amdgpu_device_deinitialize
 amdgpu_device_initialize
 amdgpu_query_buffer_size_alignment