AGESA,binaryPI: Remove early_all_cores()

This was implemented to make sure it gets called before
attempting any PCI MMIO access. Now that we have one
central romstage_main() implementation this extra precaution
is no longer useful.

Change-Id: I09b24da827e00d7a9ba0a51d5eef36f174b893a6
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37203
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>

src/include/cpu/amd/car.h

@@ -5,8 +5,6 @@
 
 void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx);
 
-void asmlinkage early_all_cores(void);
-
 void *asmlinkage romstage_main(unsigned long bist);
 
 #endif