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/LockBoxLib/LockBoxDxe.c

@@ -24,7 +24,7 @@
 
   @param  MemoryType   Memory type of memory to allocate.
   @param  Size         Size of memory to allocate.
-  
+
   @return Allocated address for output.
 
 **/