gpio: atmel_pio4: add support for PIO_PORTE

Add support for gpio PORT E, which is available on e.g. sama7g5 SoC.

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
diff --git a/drivers/gpio/atmel_pio4.c b/drivers/gpio/atmel_pio4.c
index bea609d..77a76c1 100644
--- a/drivers/gpio/atmel_pio4.c
+++ b/drivers/gpio/atmel_pio4.c
@@ -36,6 +36,11 @@
 	case AT91_PIO_PORTD:
 		base = (struct atmel_pio4_port *)ATMEL_BASE_PIOD;
 		break;
+#if (ATMEL_PIO_PORTS > 4)
+	case AT91_PIO_PORTE:
+		base = (struct atmel_pio4_port *)ATMEL_BASE_PIOE;
+		break;
+#endif
 	default:
 		printf("Error: Atmel PIO4: Failed to get PIO base of port#%d!\n",
 		       port);