Documentation: devres: add PHY get/put functions to list of supported calls

Signed-off-by: Marko Katic <dromede.gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/driver-model/devres.txt

@@ -288,3 +288,7 @@ PINCTRL
 PWM
   devm_pwm_get()
   devm_pwm_put()
+
+PHY
+  devm_usb_get_phy()
+  devm_usb_put_phy()