ARM: rockchip: enable support for RK3288 SoCs

Enable HAVE_ARM_ARCH_TIMER and add a rockchip,rk3288 compatible.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-rockchip/Kconfig

@@ -6,6 +6,7 @@ config ARCH_ROCKCHIP
 	select ARCH_REQUIRE_GPIOLIB
 	select ARM_GIC
 	select CACHE_L2X0
+	select HAVE_ARM_ARCH_TIMER
 	select HAVE_ARM_SCU if SMP
 	select HAVE_ARM_TWD if SMP
 	select DW_APB_TIMER_OF

arch/arm/mach-rockchip/rockchip.c

@@ -29,6 +29,7 @@ static const char * const rockchip_board_dt_compat[] = {
 	"rockchip,rk3066a",
 	"rockchip,rk3066b",
 	"rockchip,rk3188",
+	"rockchip,rk3288",
 	NULL,
 };