target-mips: update writing to CP0.Status.KX/SX/UX in MIPS Release R6 Implement the relationship between CP0.Status.KX, SX and UX. It should not be possible to set UX bit if SX is 0, the same applies for setting SX if KX is 0. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>