[$] Intel AMX support in 5.16

The x86 instruction set is large, but that doesn't mean it can't get biggeryet. Upcoming Intel processors will feature a new set of instructionsunder the name of "Advanced Matrix Extensions" (AMX) that can be used tooperate on matrix data. After a somewhat bumpy developmentprocess, support for AMX has found its way into the upcoming 5.16 kernel.Using it will, naturally, require some changes by application developers.