Linux 5.19 compat: asm/fpu/internal.h

As of the Linux 5.19 kernel the asm/fpu/internal.h header was
entirely removed. It has been effectively empty since the 5.16
kernel and provides no required functionality.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Attila Fülöp <attila@fueloep.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13529