arch/x86: Flip option NO_CAR_GLOBAL_MIGRATION

It is easier to track CAR_GLOBAL_MIGRATION which is
the approach to be deprecated with the next release.

This change enforces new policy; POSTCAR_STAGE=y is
not allowed together with CAR_GLOBAL_MIGRATION=y.

Change-Id: I0dbad6a14e68bf566ac0f151dc8ea259e5ae2250
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34804
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/cpu/amd/agesa/Kconfig

@@ -29,7 +29,6 @@ config CPU_AMD_AGESA
 	select UDELAY_LAPIC
 	select LAPIC_MONOTONIC_TIMER
 	select SPI_FLASH if HAVE_ACPI_RESUME
-	select POSTCAR_STAGE
 	select SMM_ASEG
 
 if CPU_AMD_AGESA

src/cpu/amd/family_10h-family_15h/Kconfig

@@ -9,6 +9,7 @@ config CPU_AMD_MODEL_10XXX
 	select UDELAY_LAPIC
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select CPU_MICROCODE_MULTIPLE_FILES
+	select CAR_GLOBAL_MIGRATION
 	select ACPI_HUGE_LOWMEM_BACKUP
 
 if CPU_AMD_MODEL_10XXX

src/cpu/amd/pi/Kconfig

@@ -28,7 +28,7 @@ config CPU_AMD_PI
 	select UDELAY_LAPIC
 	select LAPIC_MONOTONIC_TIMER
 	select SPI_FLASH if HAVE_ACPI_RESUME
-	select POSTCAR_STAGE if !BINARYPI_LEGACY_WRAPPER
+	select CAR_GLOBAL_MIGRATION if BINARYPI_LEGACY_WRAPPER
 	select SMM_ASEG
 
 if CPU_AMD_PI