clk: rockchip: rk3288: fix softreset register count

The rk3288 actually has 12 softresets, so fix the register count.

Signed-off-by: Mark yao <mark.yao@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>