Update the function headers to Doxygen format.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5410 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/BdsDxe/String.h

@@ -34,16 +34,45 @@ extern UINT8  BdsDxeStrings[];
     0x7777E939, 0xD57E, 0x4DCB, 0xA0, 0x8E, 0x64, 0xD7, 0x98, 0x57, 0x1E, 0x0F \
   }
 
+/**
+  Get string by string id from HII Interface
+
+
+  @param Id              String ID.
+
+  @retval  CHAR16 *  String from ID.
+  @retval  NULL      If error occurs.
+
+**/
 CHAR16 *
 GetStringById (
   IN  EFI_STRING_ID   Id
   );
 
+/**
+  Initialize HII global accessor for string support
+
+
+  @param VOID
+
+  @retval  EFI_SUCCESS  String support initialize success.
+
+**/
 EFI_STATUS
 InitializeStringSupport (
   VOID
   );
 
+/**
+  Call the browser and display the front page
+
+
+  @param VOID            No input.
+
+  @return   Status code that will be returned by
+            EFI_FORM_BROWSER2_PROTOCOL.SendForm ().
+
+**/
 EFI_STATUS
 CallFrontPage (
   VOID