Mesa Clover: LuxMark 3.1 has broken render with `-cl-fast-relaxed-math`

Reported there:
https://gitlab.freedesktop.org/mesa/mesa/-/issues/5671

LuxMark 3.1 now produces garbage when using Mesa Clover and AMD GCN 2, it worked before (proof).

• Software versions that worked on 2020-06-22: Mesa 20.0.8, Ubuntu 20.04, Linux 5.4.0
• Software versions that do not work on 2021-11-23: Mesa 21.2.2, Ubuntu 21.10, Linux 5.13.0

The same GCN2 R9 390X OC Edition (Hawaii/Grenada) GPU was used in both case, but it was moved from an Asus Sabertooth 990FX R2.0 motherboard with AMD FX-9590 CPU with DDR3 and PCIe 2.0 to a Gigabyte WRX80-SU8-IPMI rev. 1.0 with AMD Ryzen Threadripper PRO 3955WX CPU with DDR4 ECC and PCIe 4.0, I doubt the host changed something.

Here is what produces the same software on same hardware with an older AMDGPU-Pro Orca, previously Clover produced the same: