aarch64: Consolidate ZA tile range checks

aarch64: Consolidate ZA tile range checks

Now that all parsing of ZA tile names goes through parse_typed_reg,
we can check there for out-of-range tile numbers.  The other check
performed by parse_sme_zada_operand was to reject .q, but that can
now be done via F_STRICT instead.  (.q tiles are valid in other
contexts, so they shouldn't be rejected in parse_typed_reg.)