Input: soc_button_array - remove duplicated include

Remove duplicated include for acpi.h.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/soc_button_array.c

@@ -18,7 +18,6 @@
 #include <linux/gpio/consumer.h>
 #include <linux/gpio_keys.h>
 #include <linux/platform_device.h>
-#include <linux/acpi.h>
 
 /*
  * Definition of buttons on the tablet. The ACPI index of each button