gpio: do not include <asm/arch/gpio.h> on ARCH_BCM68360

As no gpio.h is defined for this architecture, to avoid
compilation failure, do not include <asm/arch/gpio.h> for
arch bcm68360.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/arch/arm/include/asm/gpio.h b/arch/arm/include/asm/gpio.h
index 7203ccb..acb7ea9 100644
--- a/arch/arm/include/asm/gpio.h
+++ b/arch/arm/include/asm/gpio.h
@@ -1,9 +1,10 @@
 #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_LX2160A) && !defined(CONFIG_ARCH_LS1028A) && \
-	!defined(CONFIG_ARCH_LS2080A) && !defined(CONFIG_ARCH_LS1088A) && \
-	!defined(CONFIG_ARCH_ASPEED) && !defined(CONFIG_ARCH_U8500)
+	!defined(CONFIG_ARCH_K3) && !defined(CONFIG_ARCH_BCM68360) && \
+	!defined(CONFIG_ARCH_BCM6858) && !defined(CONFIG_ARCH_BCM63158) && \
+	!defined(CONFIG_ARCH_ROCKCHIP) && !defined(CONFIG_ARCH_LX2160A) && \
+	!defined(CONFIG_ARCH_LS1028A) && !defined(CONFIG_ARCH_LS2080A) && \
+	!defined(CONFIG_ARCH_LS1088A) && !defined(CONFIG_ARCH_ASPEED) && \
+	!defined(CONFIG_ARCH_U8500)
 #include <asm/arch/gpio.h>
 #endif
 #include <asm-generic/gpio.h>