kernel/(x86|sparc): Fix cscal and zscal by reverting to the generic C kernels #5722

Job	Run time
neoverse_build	8m 0s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	9m 38s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	7m 35s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	8m 49s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	7m 44s
build (ubuntu-latest, flang, make)	19m 11s
build (macos-latest, gfortran, make)	13m 24s
build (ubuntu-latest, flang, cmake)	43m 51s
build (macos-latest, gfortran, cmake)	34m 33s
build (ubuntu-latest, gfortran, make)	21m 35s
msys2 (UCRT64, int32, Release)	14m 53s
msys2 (UCRT64, int64, Release)	17m 24s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	15m 44s
msys2 (CLANG64, int64, Release)	1h 9m 44s
build (ubuntu-latest, gfortran, cmake)	44m 43s
msys2 (CLANG64, int32, Release)	17m 53s
msys2 (MINGW32, int32, Release)	17m 3s
	6h 11m 44s

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