[NEW] movep.68k:  Test MOVEP.L at an even address
movep.68k:  Test MOVEP.L at an odd address

This currently crashes xv68k.
v68k:  Verticalize misaligned load/store check
v68k:  Allow MOVEP to access odd addresses

MOVEP is special in being either word-sized or long-sized and yet always
accessing memory a byte at a time, so that odd memory addresses aren't a
problem.  Use the high bit in the op params size field to code for this.

This makes the movep.68k tests pass in xv68k.
Merge branch 'MOVEP-fix'