use smp for pcengines-apu

Activate SMP for pcengines-apu, because it is a dual-core CPU.

Signed-off-by: J. Seitter <adk@seitter.net>

target/linux/config/Config.in.kernel

@@ -190,6 +190,7 @@ config ADK_KERNEL_SMP
 	boolean
 	default y if ADK_TARGET_CUBOX_I4PRO
 	default y if ADK_TARGET_CUBOX_I2ULTRA
+	default y if ADK_TARGET_SYSTEM_PCENGINES_APU
 	depends on ADK_TARGET_WITH_SMP
 	default n
 

target/x86_64/systems/pcengines-apu

@@ -10,6 +10,7 @@ config ADK_TARGET_SYSTEM_PCENGINES_APU
 	select ADK_TARGET_WITH_USB_BOOT
 	select ADK_TARGET_WITH_ACPI
 	select ADK_TARGET_WITH_SATA
+	select ADK_TARGET_WITH_SMP
 	select ADK_PACKAGE_GRUB
 	help
 	  Support for PC Engines APU, see