[software] Add chest_f16 kernel #1085

Job	Run time
check-opcodes	4s
riscv-isa-sim	4m 57s
tc-gcc	46m 48s
tc-llvm	2h 11m 41s
verilator	9m 23s
verilator-model (minpool)	6m 53s
verilator-model (mempool)	22m 6s
check-bootrom	25s
build-apps-gcc (minpool)	35s
build-apps-gcc (mempool)	36s
unit-test	3m 18s
build-apps-omp (minpool)	42s
build-apps-omp (mempool)	45s
run-apps-gcc	0s
build-apps-llvm (minpool)	1m 15s
build-apps-llvm (mempool)	1m 24s
tc-halide	1m 22s
build-apps-halide	0s
run-apps-halide	0s
run-apps-llvm	0s
clean-up	3s
clean-up-compile-runs (minpool)	2s
clean-up-compile-runs (mempool)	31s
	3h 52m 50s

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