aarch64: Remove scheduling models for falkor and saphira

aarch64: Remove scheduling models for falkor and saphira

These 2 qualcomm cores have been long gone in that Qualcomm has not
supported since at least 2019. Removing them will make it easier I think
to change the insn type attributes instead of keeping them up todate.

Note this does not remove the cores, just the schedule models.

Bootstrapped and tested on aarch64-linux-gnu.

gcc/ChangeLog:

	* config/aarch64/aarch64-cores.def (falkor): Use cortex-a57 scheduler.
	(saphira): Likewise.
	* config/aarch64/aarch64.md: Don't include falkor.md and saphira.md.
	* config/aarch64/falkor.md: Removed.
	* config/aarch64/saphira.md: Removed.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>