ARM: mvebu: Drop unneeded select of HAVE_SMP

ARM: mvebu: Drop unneeded select of HAVE_SMP

Support for Marvell Armada 375, 380, 385, and 39x SoCs depends on
ARCH_MULTI_V7.
As the latter selects HAVE_SMP, there is no need for MACH_ARMADA_375,
MACH_ARMADA_38X, and MACH_ARMADA_39X to select HAVE_SMP.

Link: https://lore.kernel.org/r/20200505150722.1575-12-geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Gregory Clement <gregory.clement@bootlin.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>