ARM: alpine: Drop unneeded select of HAVE_SMP

Support for Annapurna Labs Alpine platforms depends on ARCH_MULTI_V7.
As the latter selects HAVE_SMP, there is no need for ARCH_ALPINE to
select HAVE_SMP.

Link: https://lore.kernel.org/r/20200505150722.1575-4-geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Tsahee Zidenberg <tsahee@annapurnalabs.com>
Cc: Antoine Tenart <antoine.tenart@bootlin.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-alpine/Kconfig

@@ -7,7 +7,6 @@ config ARCH_ALPINE
 	select ARM_GIC
 	select GENERIC_IRQ_CHIP
 	select HAVE_ARM_ARCH_TIMER
-	select HAVE_SMP
 	select MFD_SYSCON
 	select FORCE_PCI
 	select PCI_HOST_GENERIC