drivers/gpio: stm32f1: Revert gpio register programming re-ordering

In #29055, GPIO registers programming order was modified in order
to avoid late glitch generation when programming pins at device
driver init.
The issue had been seen on non F1 device, but it made sense
to be applied on F1 series as well.
After test, it appears that it doesn't and initial F1 code was fine.
New code is generating glitch on I2C bus.
Revert the change for F1 series.


Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>