rfkill: Introduce CONFIG_RFKILL_PM and use instead of CONFIG_PM to power down

Some platforms do not want to power down rfkill devices on suspend.

Change-Id: I62a11630521c636d54a4a02ab9037a43435925f5
Signed-off-by: Nick Pelly <npelly@google.com>

net/rfkill/Kconfig

@@ -10,6 +10,11 @@ menuconfig RFKILL
 	  To compile this driver as a module, choose M here: the
 	  module will be called rfkill.
 
+config RFKILL_PM
+	bool "Power off on suspend"
+	depends on RFKILL && PM
+	default y
+
 # LED trigger support
 config RFKILL_LEDS
 	bool

net/rfkill/core.c

@@ -792,6 +792,7 @@ void rfkill_pause_polling(struct rfkill *rfkill)
 }
 EXPORT_SYMBOL(rfkill_pause_polling);
 
+#ifdef CONFIG_RFKILL_PM
 void rfkill_resume_polling(struct rfkill *rfkill)
 {
 	BUG_ON(!rfkill);
@@ -826,14 +827,17 @@ static int rfkill_resume(struct device *dev)
 
 	return 0;
 }
+#endif
 
 static struct class rfkill_class = {
 	.name		= "rfkill",
 	.dev_release	= rfkill_release,
 	.dev_attrs	= rfkill_dev_attrs,
 	.dev_uevent	= rfkill_dev_uevent,
+#ifdef CONFIG_RFKILL_PM
 	.suspend	= rfkill_suspend,
 	.resume		= rfkill_resume,
+#endif
 };
 
 bool rfkill_blocked(struct rfkill *rfkill)