gpio: do not include <asm/arch/gpio.h> on ARCH_LX2160A

As no gpio.h is defined for this architecture, to avoid
compilation failure, do not include <asm/arch/gpio.h> for
arch ls2160a.

Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
diff --git a/arch/arm/include/asm/gpio.h b/arch/arm/include/asm/gpio.h
index 370031f..f78b976 100644
--- a/arch/arm/include/asm/gpio.h
+++ b/arch/arm/include/asm/gpio.h
@@ -1,6 +1,7 @@
 #if !defined(CONFIG_ARCH_UNIPHIER) && !defined(CONFIG_ARCH_STI) && \
 	!defined(CONFIG_ARCH_K3) && !defined(CONFIG_ARCH_BCM6858) && \
-	!defined(CONFIG_ARCH_BCM63158) && !defined(CONFIG_ARCH_ROCKCHIP)
+	!defined(CONFIG_ARCH_BCM63158) && !defined(CONFIG_ARCH_ROCKCHIP) && \
+	!defined(CONFIG_ARCH_LX2160A)
 #include <asm/arch/gpio.h>
 #endif
 #include <asm-generic/gpio.h>