Apple M4 Pro is not recognized in config.guess

[Albin Ahlbäck]

Hi,

I just tried to compile GMP on my Apple M4 Macbook Pro, and 
`config.guess' did not recognize my CPU as `applem4', but simply 
`aarch64'.  I have the following:

$ system_profiler SPHardwareDataType | grep Chip
       Chip: Apple M4 Pro

Don't know if the pro models of previous generations are affected.  I 
have patched this on my system, but it would be nice if it was patched 
on upstream as well.

Best,
Albin