doc: phy: Document devm_of_phy_get()

Add the missing documentation for devm_of_phy_get(), which was forgotten
when the function was introduced.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/768d5845668f081620098a0b4479d1481e212bac.1674584626.git.geert+renesas@glider.beSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/driver-api/phy/phy.rst

@@ -106,6 +106,8 @@ it. This framework provides the following APIs to get a reference to the PHY.
 	struct phy *devm_phy_get(struct device *dev, const char *string);
 	struct phy *devm_phy_optional_get(struct device *dev,
 					  const char *string);
+	struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
+				    const char *con_id);
 	struct phy *devm_of_phy_get_by_index(struct device *dev,
 					     struct device_node *np,
 					     int index);
@@ -119,10 +121,10 @@ successful PHY get. On driver detach, release function is invoked on
 the devres data and devres data is freed.
 devm_phy_optional_get should be used when the phy is optional. This
 function will never return -ENODEV, but instead returns NULL when
-the phy cannot be found.Some generic drivers, such as ehci, may use multiple
-phys and for such drivers referencing phy(s) by name(s) does not make sense. In
-this case, devm_of_phy_get_by_index can be used to get a phy reference based on
-the index.
+the phy cannot be found.
+Some generic drivers, such as ehci, may use multiple phys. In this case,
+devm_of_phy_get or devm_of_phy_get_by_index can be used to get a phy
+reference based on name or index.
 
 It should be noted that NULL is a valid phy reference. All phy
 consumer calls on the NULL phy become NOPs. That is the release calls,