net: phy: at803x: Replace of_gpio.h with what indeed is used

of_gpio.h in this driver is solely used as a proxy to other headers.
This is incorrect usage of the of_gpio.h. Replace it .h with what
indeed is used in the code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/at803x.c

@@ -13,12 +13,11 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool_netlink.h>
-#include <linux/of_gpio.h>
 #include <linux/bitfield.h>
-#include <linux/gpio/consumer.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/consumer.h>
+#include <linux/of.h>
 #include <linux/phylink.h>
 #include <linux/sfp.h>
 #include <dt-bindings/net/qca-ar803x.h>