This fixes the existing cmode3 handling and adds cmode4.
Also fixes:
BIC <Vd>.<T>, #<imm8>{, LSL #<amount>}
ORR <Vd>.<T>, #<imm8>{, LSL #<amount>}
and adds:
MOVI <Vd>.<T>, #<imm8>{, LSL #<amount>}
MOVI <Vd>.<T>, #<imm8>, MSL #<amount>
MVNI <Vd>.<T>, #<imm8>{, LSL #<amount>}
MVNI <Vd>.<T>, #<imm8>, MSL #<amount>
Issue: #2626