efi/x86: Annotate the LOADED_IMAGE_PROTOCOL_GUID with SYM_DATA

Use SYM_DATA*() macros to annotate this constant, and explicitly align it
to 4-byte boundary. Use lower-case for hexadecimal data.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200301230436.2246909-2-nivedita@alum.mit.edu
Link: https://lore.kernel.org/r/20200308080859.21568-10-ardb@kernel.org