mfd: palmas: Stop including of_gpio.h

It does not appear that any of palmas sub-drivers are using OF-based
gpio APIs, so let's stop including this header.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220926054421.1546436-3-dmitry.torokhov@gmail.com

include/linux/mfd/palmas.h

@@ -16,7 +16,6 @@
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
 #include <linux/extcon-provider.h>
-#include <linux/of_gpio.h>
 #include <linux/usb/phy_companion.h>
 
 #define PALMAS_NUM_CLIENTS		3