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/baytrail/Kconfig

@@ -25,7 +25,6 @@ config CPU_SPECIFIC_OPTIONS
 	select PCIEXP_COMMON_CLOCK
 	select REG_SCRIPT
 	select RTC
-	select SMP
 	select SPI_FLASH
 	select SSE2
 	select TSC_MONOTONIC_TIMER