Created by: joshua-warburton
This patch readds the appropriate macros, tests and codec entries to encode the following variants which were removed in a merge:
FEXPA <Zd>.<Ts>, <Zn>.<Ts>
FTMAD <Zdn>.<Ts>, <Zdn>.<Ts>, <Zm>.<Ts>, #<imm>
FTSMUL <Zd>.<Ts>, <Zn>.<Ts>, <Zm>.<Ts>
FTSSEL <Zd>.<Ts>, <Zn>.<Ts>, <Zm>.<Ts>Contributed by Camden Mannett
Issue: #3044