Fixes to xcvbitmanip and xcvsimd

Created by: MaryBennett

The immediate operand order in instructions cv.bclr and cv.bset was wrong. Tests updated to match.

Tests for instructions cv.extract[u].[h,b] and cv.insert.[h,b] fixed for unsigned immediate sel.

Instructions cv.s[ll,ra,la].sc.[h,b] fixed for unsigned immediate j. Tests updated to match.

Files Changed:

• config/riscv/corev.md: Various fixes.
• gcc.target/riscv/cv-march-xcvbitmanip-compile-bclr.c: Fixed test.
• gcc.target/riscv/cv-march-xcvbitmanip-compile-bset.c: Likewise.
• gcc.target/riscv/cv-simd-extract-b-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-extract-h-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-extractu-b-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-extractu-h-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-insert-b-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-insert-h-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-sll-sc-b-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-sll-sc-h-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-sra-sc-b-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-sra-sc-h-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-srl-sc-b-compile-1.c: Likewise.
• gcc.target/riscv/cv-simd-srl-sc-h-compile-1.c: Likewise.