ARM: aspeed: Drop unneeded select of HAVE_SMP

Support for the 6th generation Aspeed SoCs depends on ARCH_MULTI_V7.
As the latter selects HAVE_SMP, there is no need for MACH_ASPEED_G6 to
select HAVE_SMP.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Cc: Joel Stanley <[e-mail]>
Cc: Andrew Jeffery <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Reviewed-by: Andrew Jeffery <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/mach-aspeed/Kconfig

···
 	select PINCTRL_ASPEED_G6
 	select ARM_GIC
 	select HAVE_ARM_ARCH_TIMER
-	select HAVE_SMP
 	help
 	 Say yes if you intend to run on an Aspeed ast2600 or similar
 	 sixth generation Aspeed BMCs.