i7300_idle: Cleanup based review comments

Cleanup of i7300 idle driver based on review comments from Randy Dunlap,
Andi Kleen and Len Brown.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/idle/Kconfig b/drivers/idle/Kconfig
index f5b26dd..108264d 100644
--- a/drivers/idle/Kconfig
+++ b/drivers/idle/Kconfig
@@ -5,12 +5,13 @@
 	bool
 
 config I7300_IDLE
-	tristate "Intel chipset idle power saving driver"
+	tristate "Intel chipset idle memory power saving driver"
 	select I7300_IDLE_IOAT_CHANNEL
-	depends on X86_64
+	depends on X86_64 && EXPERIMENTAL
 	help
-	  Enable idle power savings with certain Intel server chipsets.
-	  The chipset must have I/O AT support, such as the Intel 7300.
-	  The power savings depends on the type and quantity of DRAM devices.
+	  Enable memory power savings when idle with certain Intel server
+	  chipsets. The chipset must have I/O AT support, such as the
+	  Intel 7300. The power savings depends on the type and quantity of
+	  DRAM devices.
 
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