mx25: fix time accounting

The gpt_clk rate function doesn't consider the PER divider. This causes a
significant drift in time accounting. Fix this by introducing the correct rate
calculation function.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 file changed