Add intrinsics for the new FP conversions introduced by the 2024 dpISA#407

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amilendra wants to merge 2 commits intoARM-software:mainfrom

amilendra:2025-acle-fprcvt

Commits on Oct 7, 2025

Add intrinsics for the new FP conversions introduced by the 2024 dpISA
amilendra
committed

Commits on Oct 8, 2025

Extend FP Single<->Double precision conversions to return results in both GP/Neon registers
amilendra
committed