soc/intel/apollolake: Drop select SMP

The SOC has MAX_CPUS>1 so this is redundant.

Change-Id: Icb4c7551031f4e32e01198261ee9ae9b95f18142
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43818
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/apollolake/Kconfig

@@ -29,7 +29,6 @@ config CPU_SPECIFIC_OPTIONS
 	select CPU_INTEL_FIRMWARE_INTERFACE_TABLE
 	select IOAPIC
 	select PCR_COMMON_IOSF_1_0
-	select SMP
 	select SSE2
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	# Audio options