pinmux: update stm32 pinmux to support LL clock control driver

After introducing STM32Cube based clock control driver for
stm32 family, update pinmux driver to support it.
Once supported across the whole family, a clean up will be done.

Change-Id: Icc20816377f3a09f516a743462c92696a1fead3a
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
1 file changed