Fix the handling of of the kernel change from "quiet" to "low-power"

A coming kernel change will convert "quiet" to "low-power" due to how
platform_profile can now have multiple registered handlers.
(kernel 6.14 est)

Fixes #609

rog-dbus/src/zbus_platform.rs

@@ -99,6 +99,10 @@ pub trait Platform {
     #[zbus(property)]
     fn set_profile_quiet_epp(&self, epp: CPUEPP) -> zbus::Result<()>;
 
+    /// PlatformProfileChoices property
+    #[zbus(property)]
+    fn platform_profile_choices(&self) -> zbus::Result<Vec<PlatformProfile>>;
+
     /// ThrottlePolicy property
     #[zbus(property)]
     fn platform_profile(&self) -> zbus::Result<PlatformProfile>;