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>
diff --git a/src/drivers/amd/agesa/romstage.c b/src/drivers/amd/agesa/romstage.c
index 72aac3e..0ecfeb2b 100644
--- a/src/drivers/amd/agesa/romstage.c
+++ b/src/drivers/amd/agesa/romstage.c
@@ -27,15 +27,6 @@
 #include <northbridge/amd/agesa/agesa_helper.h>
 #include <northbridge/amd/agesa/state_machine.h>
 
-#if !CONFIG(POSTCAR_STAGE)
-#error "Only POSTCAR_STAGE is supported."
-#endif
-
-void asmlinkage early_all_cores(void)
-{
-	amd_initmmio();
-}
-
 void __weak platform_once(struct sysinfo *cb)
 {
 	board_BeforeAgesa(cb);
@@ -57,6 +48,9 @@
 	u8 initial_apic_id = (u8) (cpuid_ebx(1) >> 24);
 	int cbmem_initted = 0;
 
+	/* Enable PCI MMIO configuration. */
+	amd_initmmio();
+
 	fill_sysinfo(cb);
 
 	if ((initial_apic_id == 0) && boot_cpu()) {