[Hexagon] Add new register input/output types for qf instructions (#184398) The v81 iset has been updated with input and output register types/extensions for instructions. Currently, it supports qf32/qf16 register types. This patch implements a qf reg type lookup to query these types. In the future, the register type extractor can be improved and more APIs can be added to support other register types. Co-authored-by: <santdas@qti.qualcomm.com>
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