mfd: Add a dependency on HAVE_CLK for tc6393xb

tc6393xb calls the clk API.
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/Kconfig

@@ -312,7 +312,7 @@ config MFD_TC6387XB
 
 config MFD_TC6393XB
 	bool "Support Toshiba TC6393XB"
-	depends on GPIOLIB && ARM
+	depends on GPIOLIB && ARM && HAVE_CLK
 	select MFD_CORE
 	select MFD_TMIO
 	help