target-sparc: Store mmu index in TB flags

target-sparc: Store mmu index in TB flags

Doing this instead of saving the raw PS_PRIV and TL.  This means
that all nucleus mode TBs (TL > 0) can be shared.  This fixes a
bug in that we didn't include HS_PRIV in the TB flags, and so could
produce incorrect TB matches for hypervisor state.

The LSU and DMMU states were unused by the translator.  Including
them in TB flags meant unnecessary mismatches from tb_find_fast.

Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>