Rollup merge of #160949 - beetrees:f128-inline-asm-sparc, r=folkertdev

Add floating point inline ASM support for SPARC

This PR adds support for floating point registers to SPARC inline ASM.

Ping target maintainers: @psumbera @kulikjak @jonathanpallant @mvolfik @he32 @0323pin @semarie

Tracking issues:
f16 inline ASM: rust-lang/rust#125398 (part of rust-lang/rust#116909)
SPARC inline ASM: rust-lang/rust#93335