Remove trailing whitespaces in AMDGPUUsage.rst

Author: Pierre-vh

llvm/docs/AMDGPUUsage.rst

@@ -361,8 +361,8 @@ Every processor supports every OS ABI (see :ref:`amdgpu-os`) with the following
                                                     - tgsplit           flat          - *rocm-amdhsa* - AMD Instinct MI250 Accelerator
                                                     - xnack             scratch       - *rocm-amdhsa* - AMD Instinct MI250X Accelerator
                                                     - kernarg preload - Packed
-                                                                        work-item                      
-                                                                        IDs                             
+                                                                        work-item
+                                                                        IDs
 
      ``gfx90c``                  ``amdgcn``   APU   - xnack           - Absolute      - *pal-amdpal*  - Ryzen 7 4700G
                                                                         flat                          - Ryzen 7 4700GE