target-ppc: Move To/From VSR Instructions

target-ppc: Move To/From VSR Instructions

This patch adds the Move To VSR instructions (mfvsrd, mfvsrwz)
and Move From VSR instructions (mtvsrd, mtvsrwa, mtvsrwz).  These
instructions are unusual in that they are considered a floating
point instruction if the indexed VSR is in the first half of the
array (0-31) but they are considered vector instructions if the
indexed VSR is in the second half of the array (32-63).

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>