x86/platform/geode: Drop <linux/gpio.h> includes

These board files only use gpio_keys not gpio in general. This include is
just surplus, delete it.

Signed-off-by: Linus Walleij <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: [e-mail]
Cc: Andres Salomon <[e-mail]>
Cc: [e-mail]
Cc: Andy Shevchenko <[e-mail]>
Cc: Darren Hart <[e-mail]>
Cc: [e-mail]
Link: https://lkml.kernel.org/r/[e-mail]

arch/x86/platform/geode/alix.c

···
 #include <linux/moduleparam.h>
 #include <linux/leds.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
 #include <linux/dmi.h>

arch/x86/platform/geode/geos.c

···
 #include <linux/string.h>
 #include <linux/leds.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
 #include <linux/dmi.h>

arch/x86/platform/geode/net5501.c

···
 #include <linux/string.h>
 #include <linux/leds.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>