[PATCH 1/2] perf tools riscv: Allow get_cpuid return empty MARCH and MIMP

[Inochi Amaoto]

> Then why do you need first patch then ?
>
> marchid, mimpid will never be NULL they "0x0" and "0x0" strings
> respectively.
>
> How have you tested it ?
>
> There no way "0x5b7-0x0000000000000000-0x[[:xdigit:]]+" will match
> "0x5b7-0x0-0x0" which cpuid in your case.
>
> Just drop this patch.
>
> Anyway "PAGER=cat perf list pmu" gives me an empty list on licheerv.

Sorry for this mistake, I mistook the type of the MIMP and MARCH as
unsigned long. And I write wrong MARCH id in my test container.

Anyway, I agree to drop this patch as there is no need.