[PATCH V2 1/2] mips: add hp-timing support for MIPS R2

[Maciej W. Rozycki]

On Wed, 2 Dec 2020, Huang Pei wrote:

> MIPS R2 only support 32 bit TSC(AKA "rdhwr %0, $2"), but it should be
> enough for glibc.
> 
> DO remember Linux/MIPS added emulation for 'rdhwr %0, $2'，when disabled
> or not supported, which would make the precision worse. If you got
> unreasonable result, check your CPU Manual for whether your CPU
> implemented it or not

 As discussed previously please rewrite the change description so as not 
to mislead with irrelevant information.

  Maciej