[AArch64] Fixup core tunings

[AArch64] Fixup core tunings

Several tuning settings in cores.def are not consistent.
Set the tuning for Cortex-A76AE and Cortex-A77 to neoversen1 so
it is the same as for Cortex-A76 and Neoverse N1.
Set the tuning for Neoverse E1 to cortexa73 so it's the same as for
Cortex-A65. Set the scheduler for Cortex-A65 and Cortex-A65AE to
cortexa53.

    gcc/
	* config/aarch64/aarch64-cores.def:
	("cortex-a76ae"): Use neoversen1 tuning.
	("cortex-a77"): Likewise.
	("cortex-a65"): Use cortexa53 scheduler.
	("cortex-a65ae"): Likewise.
	("neoverse-e1"): Use cortexa73 tuning.

From-SVN: r279526