kernel/arm64: fixed cscal and zscal #5680

Job	Run time
build (ubuntu-latest, flang, make)	18m 21s
build (ubuntu-latest, gfortran, make)	22m 40s
msys2 (UCRT64, int64, Release)	16m 0s
build (macos-latest, gfortran, make)	4m 58s
msys2 (MINGW32, int32, Release)	16m 31s
build (ubuntu-latest, flang, cmake)	45m 21s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	11m 26s
build (macos-latest, gfortran, cmake)	12m 35s
msys2 (UCRT64, int32, Release)	12m 38s
neoverse_build	7m 32s
build (ubuntu-latest, gfortran, cmake)	46m 8s
msys2 (CLANG64, int64, Release)	16m 44s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	3m 29s
msys2 (CLANG64, int32, Release)	15m 6s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	2m 45s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	3m 27s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	2m 38s
	4h 18m 19s

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