PM / devfreq: set min/max freq limit from freq table

Set devfreq device min and max frequency limits when device
is added to devfreq, provided frequency table is supplied.
This helps governors to suggest target frequency with in
limits.

Change-Id: Iab24aef59bfeffcfb3c3118c12ba58e25cd9d479
Signed-off-by: Rajagopal Venkat <rajagopal.venkat@linaro.org>
Patch-mainline: linux-pm @ 01/08/13, 05:50
Signed-off-by: Vladimir Razgulin <vrazguli@codeaurora.org>