mfd: Add Makefile and Kconfig Entries for tps65911 comparator

Base on Mark's comment [1], I make the Kconfig entry invisible to users.
[1] https://lkml.org/lkml/2011/5/14/136Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/Kconfig

@@ -728,6 +728,9 @@ config MFD_TPS65910
 	  if you say yes here you get support for the TPS65910 series of
 	  Power Management chips.
 
+config TPS65911_COMPARATOR
+	tristate
+
 endif # MFD_SUPPORT
 
 menu "Multimedia Capabilities Port drivers"

drivers/mfd/Makefile

@@ -94,3 +94,4 @@ obj-$(CONFIG_MFD_OMAP_USB_HOST)	+= omap-usb-host.o
 obj-$(CONFIG_MFD_PM8921_CORE) 	+= pm8921-core.o
 obj-$(CONFIG_MFD_PM8XXX_IRQ) 	+= pm8xxx-irq.o
 obj-$(CONFIG_MFD_TPS65910)	+= tps65910.o tps65910-irq.o
+obj-$(CONFIG_TPS65911_COMPARATOR)	+= tps65911-comparator.o