sunxi: gpio: Build sunxi_name_to_gpio_bank for driver-model code too

When doing a driver-model enabled build we still need sunxi_name_to_gpio_bank
(for now) for the mmc pinmux code in board/sunxi/board.c, so build it for
driver-model enabled builds too.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

drivers/gpio/sunxi_gpio.c

@@ -118,20 +118,6 @@ int gpio_set_value(unsigned gpio, int value)
 	return sunxi_gpio_output(gpio, value);
 }
 
-int sunxi_name_to_gpio_bank(const char *name)
-{
-	int group = 0;
-
-	if (*name == 'P' || *name == 'p')
-		name++;
-	if (*name >= 'A') {
-		group = *name - (*name > 'a' ? 'a' : 'A');
-		return group;
-	}
-
-	return -1;
-}
-
 int sunxi_name_to_gpio(const char *name)
 {
 	int group = 0;
@@ -171,6 +157,20 @@ int sunxi_name_to_gpio(const char *name)
 }
 #endif
 
+int sunxi_name_to_gpio_bank(const char *name)
+{
+	int group = 0;
+
+	if (*name == 'P' || *name == 'p')
+		name++;
+	if (*name >= 'A') {
+		group = *name - (*name > 'a' ? 'a' : 'A');
+		return group;
+	}
+
+	return -1;
+}
+
 #ifdef CONFIG_DM_GPIO
 /* TODO(sjg@chromium.org): Remove this function and use device tree */
 int sunxi_name_to_gpio(const char *name)