[RISCV] Use Hints for Xqcisim/Xqcisync Aliases (#151040)
My aim here is to make these a little easier to maintain by relying on
aliases where these instructions overlap with the Hint instructions they
are based on.
The following instructions have not been converted to aliases as they
have complex mappings from ther immediate encodings to the immediate
encoding of the underlying instruction (setting high bits):
- qc.pputci
- qc.sync, qc.sync, qc.syncwf, qc.syncwl
- qc.c.sync, qc.c.syncr, qc.c.syncwf, qc.syncwl
Co-authored-by: Sudharsan Veeravalli <quic_svs@quicinc.com>
