drivers: net: xgene: Don't use "proxy" headers

Update header inclusions to follow IWYU (Include What You Use)
principle.

In this case replace *gpio.h, which are subject to remove by the GPIOLIB
subsystem, with the respective headers that are being used by the driver.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c

···
  *	    Keyur Chudgar <[e-mail]>
  */
 
-#include <linux/of_gpio.h>
-#include <linux/gpio.h>
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/io.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
 #include "xgene_enet_main.h"
 #include "xgene_enet_hw.h"
 #include "xgene_enet_xgmac.h"