cpu,soc/intel: Drop select SMP

Implicitly selected with MAX_CPUS != 1.

Change-Id: I4ac3e30e9f96cd52244b4bae73bafce0564d41e0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42091
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/xeon_sp/Kconfig

@@ -39,7 +39,6 @@ config	CPU_SPECIFIC_OPTIONS
 	select IOAPIC
 	select PARALLEL_MP
 	select ACPI_NO_SMI_GNVS
-	select SMP
 	select INTEL_DESCRIPTOR_MODE_CAPABLE
 	select SOC_INTEL_COMMON_BLOCK
 	select SOC_INTEL_COMMON_BLOCK_CPU