OvmfPkg: strip trailing whitespace

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Julien Grall <julien.grall@arm.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>

OvmfPkg/Library/XenIoMmioLib/XenIoMmioLib.c

@@ -102,7 +102,7 @@ XenIoMmioInstall (
     *Handle = OutHandle;
     return EFI_SUCCESS;
   }
-  
+
   DEBUG ((EFI_D_ERROR, "%a: Failed to install the EFI_DEVICE_PATH and "
     "XENIO_PROTOCOL protocols on handle %p (Status == %r)\n",
     __FUNCTION__, OutHandle, Status));