gpiolib: of: Reshuffle contents of consumer.h for new library layout

Kernel build bot reported a compilation error after the commit

  f626d6df ("gpio: of: Break out OF-only code"):

drivers/gpio/gpiolib-devres.o: In function `devm_gpiod_get_from_of_node':
gpiolib-devres.c:(.text+0x19a): undefined reference to `gpiod_get_from_of_node'

This happens due to move the latter under umbrella of CONFIG_OF_GPIO while
customer.h contains staled data.

Fix it by reshuffling contents of consumer.h to satisfy build dependencies.
Reported-by: kbuild test robot <lkp@intel.com>
Fixes: f626d6df ("gpio: of: Break out OF-only code"):
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190730104337.21235-1-andriy.shevchenko@linux.intel.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

include/linux/gpio/consumer.h

@@ -170,18 +170,8 @@ struct gpio_desc *gpio_to_desc(unsigned gpio);
 int desc_to_gpio(const struct gpio_desc *desc);
 
 /* Child properties interface */
-struct device_node;
 struct fwnode_handle;
 
-struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
-					 const char *propname, int index,
-					 enum gpiod_flags dflags,
-					 const char *label);
-struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
-					      struct device_node *node,
-					      const char *propname, int index,
-					      enum gpiod_flags dflags,
-					      const char *label);
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 					 const char *propname, int index,
 					 enum gpiod_flags dflags,
@@ -530,28 +520,8 @@ static inline int desc_to_gpio(const struct gpio_desc *desc)
 }
 
 /* Child properties interface */
-struct device_node;
 struct fwnode_handle;
 
-static inline
-struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
-					 const char *propname, int index,
-					 enum gpiod_flags dflags,
-					 const char *label)
-{
-	return ERR_PTR(-ENOSYS);
-}
-
-static inline
-struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
-					      struct device_node *node,
-					      const char *propname, int index,
-					      enum gpiod_flags dflags,
-					      const char *label)
-{
-	return ERR_PTR(-ENOSYS);
-}
-
 static inline
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 					 const char *propname, int index,
@@ -584,6 +554,54 @@ struct gpio_desc *devm_fwnode_get_gpiod_from_child(struct device *dev,
 						      flags, label);
 }
 
+#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_OF_GPIO)
+struct device_node;
+
+struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
+					 const char *propname, int index,
+					 enum gpiod_flags dflags,
+					 const char *label);
+
+#else  /* CONFIG_GPIOLIB && CONFIG_OF_GPIO */
+
+struct device_node;
+
+static inline
+struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
+					 const char *propname, int index,
+					 enum gpiod_flags dflags,
+					 const char *label)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+#endif /* CONFIG_GPIOLIB && CONFIG_OF_GPIO */
+
+#ifdef CONFIG_GPIOLIB
+struct device_node;
+
+struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
+					      struct device_node *node,
+					      const char *propname, int index,
+					      enum gpiod_flags dflags,
+					      const char *label);
+
+#else  /* CONFIG_GPIOLIB */
+
+struct device_node;
+
+static inline
+struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
+					      struct device_node *node,
+					      const char *propname, int index,
+					      enum gpiod_flags dflags,
+					      const char *label)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+#endif /* CONFIG_GPIOLIB */
+
 #if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_GPIO_SYSFS)
 
 int gpiod_export(struct gpio_desc *desc, bool direction_may_change);