PM: Kconfig: remove unneeded "default n" options

Remove "default n" options. If the "default" line is removed, it
defaults to 'n'.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/power/Kconfig

@@ -139,7 +139,6 @@ config PM_SLEEP_SMP_NONZERO_CPU
 config PM_AUTOSLEEP
 	bool "Opportunistic sleep"
 	depends on PM_SLEEP
-	default n
 	help
 	Allow the kernel to trigger a system transition into a global sleep
 	state automatically whenever there are no active wakeup sources.
@@ -147,7 +146,6 @@ config PM_AUTOSLEEP
 config PM_WAKELOCKS
 	bool "User space wakeup sources interface"
 	depends on PM_SLEEP
-	default n
 	help
 	Allow user space to create, activate and deactivate wakeup source
 	objects with the help of a sysfs-based interface.
@@ -293,7 +291,6 @@ config PM_GENERIC_DOMAINS
 config WQ_POWER_EFFICIENT_DEFAULT
 	bool "Enable workqueue power-efficient mode by default"
 	depends on PM
-	default n
 	help
 	  Per-cpu workqueues are generally preferred because they show
 	  better performance thanks to cache locality; unfortunately,