powerpc: make module stub code endian independent
powerpc: make module stub code endian independent

By representing them as words, rather than chars, we can avoid
endian ifdefs.

Signed-off-by: Rusty Russell <df9728c9e5104131c08c7adb03af425394842596@rustcorp.com.au>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs