After this commit, the non-policy variants of vid and viota are no
longer available for an oveloaded version since the default policy is
now TAMA and the masked-off operand is removed.
Be noted that ALL RVV intrinsics now operate under the general
assumption that a policy behavior is "agnostic" unless specified.
Therefore this patch also changes the semantic of policy intrinsics
with the suffix of _ta and tu. These intrinsics don't have their
mask policy specified and was assumed to be undisturbed. It is now
changed to agnostic.
This is the 14th commit of a patch-set that aims to change the default policy
for RVV intrinsics from TAMU to TAMA.
Please refer to the cover letter in the 1st commit (D141573) for an
overview.