MdePkg: Apply uncrustify changes

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737

Apply uncrustify changes to .c/.h files in the MdePkg package

Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdePkg/Include/Library/MmServicesTableLib.h

@@ -14,6 +14,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 
 #include <PiMm.h>
 
-extern EFI_MM_SYSTEM_TABLE         *gMmst;
+extern EFI_MM_SYSTEM_TABLE  *gMmst;
 
 #endif