clk: remove COMMON_CLK_DISABLE_UNUSED

Exposing this option generates confusion and incorrect behavior for
single-image builds across platforms.  Enable this behavior permanently.
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Acked-by: Saravana Kannan <skannan@codeaurora.org>

drivers/clk/Kconfig

@@ -23,17 +23,6 @@ config COMMON_CLK
 menu "Common Clock Framework"
 	depends on COMMON_CLK
 
-config COMMON_CLK_DISABLE_UNUSED
-	bool "Disabled unused clocks at boot"
-	depends on COMMON_CLK
-	---help---
-	  Traverses the entire clock tree and disables any clocks that are
-	  enabled in hardware but have not been enabled by any device drivers.
-	  This saves power and keeps the software model of the clock in line
-	  with reality.
-
-	  If in doubt, say "N".
-
 config COMMON_CLK_DEBUG
 	bool "DebugFS representation of clock tree"
 	depends on COMMON_CLK

drivers/clk/clk.c

@@ -196,7 +196,6 @@ late_initcall(clk_debug_init);
 static inline int clk_debug_register(struct clk *clk) { return 0; }
 #endif
 
-#ifdef CONFIG_COMMON_CLK_DISABLE_UNUSED
 /* caller must hold prepare_lock */
 static void clk_disable_unused_subtree(struct clk *clk)
 {
@@ -246,7 +245,6 @@ static int clk_disable_unused(void)
 	return 0;
 }
 late_initcall(clk_disable_unused);
-#endif
 
 /***    helper functions   ***/