Bump axi_riscv_atomics v0.8.0 #496

Job	Run time
riscv-tests (asm-tests, cv64a6_imafdc_sv39)	1h 2m 59s
riscv-tests (asm-tests, cv64a6_imafdcsclic_sv39)	1h 2m 46s
riscv-tests (mul, cv64a6_imafdc_sv39)	22m 12s
riscv-tests (mul, cv64a6_imafdcsclic_sv39)	18m 32s
riscv-tests (amo, cv64a6_imafdc_sv39)	26m 41s
riscv-tests (amo, cv64a6_imafdcsclic_sv39)	30m 49s
riscv-tests (fp, cv64a6_imafdc_sv39)	30m 30s
riscv-tests (fp, cv64a6_imafdcsclic_sv39)	29m 36s
riscv-tests (benchmarks, cv64a6_imafdc_sv39)	20m 9s
riscv-tests (benchmarks, cv64a6_imafdcsclic_sv39)	21m 9s
riscv-tests (clic, cv64a6_imafdcsclic_sv39)	6m 40s
riscv-tests (hyp, cv64a6_imafdcsclic_sv39)	1h 29m 17s
	7h 1m 20s

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