ion: Improve ION config description

Mostly just to quiet checkpatch warnings, be more verbose
in describing the ION config option.
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/Kconfig

@@ -2,8 +2,12 @@ menuconfig ION
 	tristate "Ion Memory Manager"
 	select GENERIC_ALLOCATOR
 	select DMA_SHARED_BUFFER
-	help
-	  Chose this option to enable the ION Memory Manager.
+	---help---
+	  Chose this option to enable the ION Memory Manager,
+	  used by Android to efficiently allocate buffers
+	  from userspace that can be shared between drivers.
+	  If you're not using Android its probably safe to
+	  say N here.
 
 config ION_TEST
 	tristate "Ion Test Device"