clk: ti: add support for TI fixed factor clock

This behaves exactly in similar manner to basic fixed-factor-clock, but
adds a few properties on top for handling clock hardware autoidling.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

diff --cc Documentation/devicetree/bindings/clock/ti/fixed-factor-clock.txt
Simple merge

diff --cc drivers/clk/ti/Makefile
Simple merge

diff --cc drivers/clk/ti/fixed-factor.c
Simple merge