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/Guid/FileSystemVolumeLabelInfo.h

@@ -20,12 +20,12 @@ typedef struct {
   ///
   /// The Null-terminated string that is the volume's label.
   ///
-  CHAR16  VolumeLabel[1];
+  CHAR16    VolumeLabel[1];
 } EFI_FILE_SYSTEM_VOLUME_LABEL;
 
 #define SIZE_OF_EFI_FILE_SYSTEM_VOLUME_LABEL \
         OFFSET_OF (EFI_FILE_SYSTEM_VOLUME_LABEL, VolumeLabel)
 
-extern EFI_GUID gEfiFileSystemVolumeLabelInfoIdGuid;
+extern EFI_GUID  gEfiFileSystemVolumeLabelInfoIdGuid;
 
 #endif