cpuidle: Remove manual selection of the multiple driver support

Like the coupled idle state, it is not up to the user to set this option
but the driver to select it.

Remove the interactive selection of this option.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpuidle/Kconfig

@@ -15,12 +15,7 @@ config CPU_IDLE
 if CPU_IDLE
 
 config CPU_IDLE_MULTIPLE_DRIVERS
-        bool "Support multiple cpuidle drivers"
-        default n
-        help
-         Allows the cpuidle framework to use different drivers for each CPU.
-         This is useful if you have a system with different CPU latencies and
-         states. If unsure say N.
+        bool
 
 config CPU_IDLE_GOV_LADDER
 	bool "Ladder governor (for periodic timer tick)"