risc-v : fix dtrace-check for fp == oldfp

[maciphone2_googlemail.com]

Summary

detected by build-error , derived from https://reviews.freebsd.org/R9:1cb290d2f2458109fa492d300e21f102a41b6874

[mhorne]

Hi, there is an open review in D28054, discussing the issues with this function (and included build fix).

If there is no movement on that change within a few hours, I will commit this fix.

[maciphone2_googlemail.com]

In D28151#629249, @mhorne wrote:

Hi, there is an open review in D28054, ......

Hi, ah, o.k., didn`t see that. I didn`t make further dtrace-tests because still struggling with
solving the bootup-panic of the HiFiveUnleashed.

[mhorne]

In D28151#629276, @maciphone2_googlemail.com wrote:

In D28151#629249, @mhorne wrote:

Hi, there is an open review in D28054, ......

Hi, ah, o.k., didn`t see that. I didn`t make further dtrace-tests because still struggling with
solving the bootup-panic of the HiFiveUnleashed.

Of course. I am planning to come back to that thread and try to help you get it running, I just haven't had a lot of time for riscv work in the past few weeks.

[maciphone2_googlemail.com]

In D28151#629277, @mhorne wrote:

Of course. I am planning to come back to that thread and try to help you get it running,...

thank you!... sidenote: also doesn't work with BBL/ u-boot-payload .. we`ll talk about it in the mailing list, Regards

[maciphone2_googlemail.com]

fixed in https://reviews.freebsd.org/R10:0b92d1dd18c148740cf00b985e8641ad1670ba87