zicsr extension issue

[quickflow]

Hi - encountering the below - any help appreciated

arch/riscv/cpu/cpu.c: Assembler messages:
arch/riscv/cpu/cpu.c:94: Error: unrecognized opcode csrs sstatus,a5', extension zicsr' required
arch/riscv/cpu/cpu.c:95: Error: unrecognized opcode csrw 0x003,0', extension zicsr' required