kernel/mips(64): Fix cscal and zscal #5742

Job	Run time
msys2 (UCRT64, int32, Release)	1h 39m 33s
msys2 (CLANG64, int64, Release)	1h 10m 11s
msys2 (CLANG64, int32, Release)	16m 33s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	15m 2s
msys2 (MINGW32, int32, Release)	17m 22s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	3m 39s
build (ubuntu-latest, gfortran, cmake)	11m 23s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	2m 49s
build (ubuntu-latest, flang, cmake)	11m 5s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	2m 51s
msys2 (UCRT64, int64, Release)	16m 28s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	3m 35s
build (ubuntu-latest, flang, make)	4m 57s
build (ubuntu-latest, gfortran, make)	22m 55s
build (macos-latest, gfortran, cmake)	14m 33s
build (macos-latest, gfortran, make)	12m 57s
neoverse_build	8m 1s
	5h 33m 54s

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