ARM: OMAP2+: devices: remove duplicated include from devices.c

Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index c3bc58b..3c1279f 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -15,7 +15,6 @@
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/pinctrl/machine.h>