cpufreq: Add more verbose description of interactive governor

Update the Kconfig help paragraph to give more detail about
interactive governor.

Change-Id: I607b817b370accac3a685001649a15e2f7894f59
Signed-off-by: Allen Martin <amartin@nvidia.com>
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 20facb8..1947088 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -172,6 +172,17 @@
 	  'interactive' - This driver adds a dynamic cpufreq policy governor
 	  designed for latency-sensitive workloads.
 
+	  This governor attempts to reduce the latency of clock
+	  increases so that the system is more responsive to
+	  interactive workloads.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_interactive.
+
+	  For details, take a look at linux/Documentation/cpu-freq.
+
+	  If in doubt, say N.
+
 config CPU_FREQ_GOV_CONSERVATIVE
 	tristate "'conservative' cpufreq governor"
 	depends on CPU_FREQ