Adding FPU support for Asus RT-AX53U

[Borromini]

From what I can find MT7621 does not have a FPU. You can't add support for something that's not there.

This topic might interest you though:

How to enable MIPS FPU Emulator when compiling?

Just to note - even MIPS cores with hardware FPU need the emulator to work around an FPU errata... The challenge here is that OpenWRT disabled the FPU emulator for small memory targets (16/4) as it does take up a bit of RAM...