clk: fix compilation errors for poplar platform

Move clk_release_all() prototype and definition inside
OF_CONTROL flag to avoid following compilation error for
poplar platform:

aarch64:  +   poplar
+drivers/usb/host/built-in.o: In function `ehci_usb_remove':
+drivers/usb/host/ehci-generic.c:159: undefined reference to `clk_release_all'
+drivers/usb/host/built-in.o: In function `ehci_usb_probe':
+drivers/usb/host/ehci-generic.c:133: undefined reference to `clk_release_all'
+make[1]: *** [u-boot] Error 139
+make: *** [sub-make] Error 2

Introduced by 4e542c4 clk: add clk_release_all()

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

drivers/clk/clk-uclass.c

@@ -114,6 +114,30 @@ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
 
 	return clk_get_by_index(dev, index, clk);
 }
+
+int clk_release_all(struct clk *clk, int count)
+{
+	int i, ret;
+
+	for (i = 0; i < count; i++) {
+		debug("%s(clk[%d]=%p)\n", __func__, i, &clk[i]);
+
+		/* check if clock has been previously requested */
+		if (!clk[i].dev)
+			continue;
+
+		ret = clk_disable(&clk[i]);
+		if (ret && ret != -ENOSYS)
+			return ret;
+
+		ret = clk_free(&clk[i]);
+		if (ret && ret != -ENOSYS)
+			return ret;
+	}
+
+	return 0;
+}
+
 #endif /* OF_CONTROL */
 
 int clk_request(struct udevice *dev, struct clk *clk)
@@ -190,29 +214,6 @@ int clk_disable(struct clk *clk)
 	return ops->disable(clk);
 }
 
-int clk_release_all(struct clk *clk, int count)
-{
-	int i, ret;
-
-	for (i = 0; i < count; i++) {
-		debug("%s(clk[%d]=%p)\n", __func__, i, &clk[i]);
-
-		/* check if clock has been previously requested */
-		if (!clk[i].dev)
-			continue;
-
-		ret = clk_disable(&clk[i]);
-		if (ret && ret != -ENOSYS)
-			return ret;
-
-		ret = clk_free(&clk[i]);
-		if (ret && ret != -ENOSYS)
-			return ret;
-	}
-
-	return 0;
-}
-
 UCLASS_DRIVER(clk) = {
 	.id		= UCLASS_CLK,
 	.name		= "clk",

include/clk.h

@@ -98,6 +98,21 @@ int clk_get_by_index(struct udevice *dev, int index, struct clk *clk);
  * @return 0 if OK, or a negative error code.
  */
 int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk);
+
+/**
+ * clk_release_all() - Disable (turn off)/Free an array of previously
+ * requested clocks.
+ *
+ * For each clock contained in the clock array, this function will check if
+ * clock has been previously requested and then will disable and free it.
+ *
+ * @clk:	A clock struct array that was previously successfully
+ *		requested by clk_request/get_by_*().
+ * @count	Number of clock contained in the array
+ * @return zero on success, or -ve error code.
+ */
+int clk_release_all(struct clk *clk, int count);
+
 #else
 static inline int clk_get_by_index(struct udevice *dev, int index,
 				   struct clk *clk)
@@ -110,6 +125,12 @@ static inline int clk_get_by_name(struct udevice *dev, const char *name,
 {
 	return -ENOSYS;
 }
+
+static inline int clk_release_all(struct clk *clk, int count)
+{
+	return -ENOSYS;
+}
+
 #endif
 
 /**
@@ -174,20 +195,6 @@ int clk_enable(struct clk *clk);
  */
 int clk_disable(struct clk *clk);
 
-/**
- * clk_release_all() - Disable (turn off)/Free an array of previously
- * requested clocks.
- *
- * For each clock contained in the clock array, this function will check if
- * clock has been previously requested and then will disable and free it.
- *
- * @clk:	A clock struct array that was previously successfully
- *		requested by clk_request/get_by_*().
- * @count	Number of clock contained in the array
- * @return zero on success, or -ve error code.
- */
-int clk_release_all(struct clk *clk, int count);
-
 int soc_clk_dump(void);
 
 #endif