[efi] Synchronise EFI header files

Now that the PACKED macro conflict is resolved, we can use an
unmodified import of the EFI header files (using
include/ipxe/efi/import.pl).

Synchronised to EDK2 SVN revision 10556.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/efi/Base.h

   #define ASM_FUNCTION_REMOVE_IF_UNREFERENCED
 #endif
 
+#ifdef __CC_ARM
+  //
+  // Older RVCT ARM compilers don't fully support #pragma pack and require __packed
+  // as a prefix for the structure.
+  //
+  #define PACKED  __packed
+#else
+  #define PACKED
+#endif
+
 ///
 /// 128 bit buffer containing a unique identifier value.
 /// Unless otherwise specified, aligned on a 64 bit boundary.

src/include/ipxe/efi/efi.h

  * header to reflect its new location within the iPXE tree.  It will
  * also tidy up the file by removing carriage return characters and
  * trailing whitespace.
- *
- *
- * At the time of writing, there are a few other modifications to
- * these headers that are present in my personal edk2 tree, that are
- * not yet committed back to the main edk2 repository.  These
- * modifications are fixes for compilation on case-dependent
- * filesystems, compilation under -mrtd and -mregparm=3, etc.
  */
 
 /* EFI headers rudely redefine NULL */