clk: imx: imx8mq: Fix the rate propagation for arm pll

The arm pll bypass needs to propagate the rate upwards
in order for the cpufreq to work.

Fixes: b8052204 ("clk: imx: Add clock driver for i.MX8MQ CCM")
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>