ARM: Kconfig: set default gpio number for rockchip SoCs

The new rk3288 needs a bigger gpio space, as it has 9 gpio banks.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Tested-by: Will Deacon <will.deacon@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 245058b..b3ba139 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1558,6 +1558,7 @@
 	default 416 if ARCH_SUNXI
 	default 392 if ARCH_U8500
 	default 352 if ARCH_VT8500
+	default 288 if ARCH_ROCKCHIP
 	default 264 if MACH_H4700
 	default 0
 	help