gnu-efi Code

Calling the various Print functions picked up some warnings in my
project (using GCC 4.8 and 4.9 at the moment):
warning: passing argument 1 of Print discards const qualifier from
pointer target type [enabled by default]

Signed-off-by: Nigel Croxon <noxorc@...>
Signed-off-by: Justinian <justinian@...>