net: phy: hide the PHYLIB_LEDS knob

commit 4bb7aac ("net: phy: fix circular LEDS_CLASS dependencies")
solved a build failure, but introduces a new config knob with a default
'y' value: PHYLIB_LEDS.

The latter is against the current new config policy. The exception
was raised to allow the user to catch bad configurations without led
support.

Anyway the current definition of PHYLIB_LEDS does not fit the above
goal: if LEDS_CLASS is disabled, the new config will be available
only with PHYLIB disabled, too.

Hide the mentioned config, to preserve the randconfig testing done so
far, while respecting the mentioned policy.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/r/d82489be8ed911c383c3447e9abf469995ccf39a.1682496488.git.pabeni@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: Paolo Abeni

drivers/net/phy/Kconfig

@@ -45,10 +45,8 @@ config LED_TRIGGER_PHY
 		for any speed known to the PHY.
 
 config PHYLIB_LEDS
-	bool "Support probing LEDs from device tree"
+	def_bool OF
 	depends on LEDS_CLASS=y || LEDS_CLASS=PHYLIB
-	depends on OF
-	default y
 	help
 	  When LED class support is enabled, phylib can automatically
 	  probe LED setting from device tree.