drivers/pinmux: stm32f1: Rework pinmux remap information encoding

Aim of this change is to remove the need for the pinmux driver
on stm32f1 series to access the base address of the pinmux owner
device.

This is achieved by a modification in the device tree pin definition.
Instead of providing a generic information on type of the remap
(such as NO_REMAP, PARTIAL_REMAP, FULL_REMAP), the remap field
encodes all the information required to perform the remap register
configuration:
-Address of the targeted remap register in AFIO peripheral
-Position of the remap configuration in the remap register
-Mask used for the remap configuration encoding
-Value of the expected remap configuration.

All the possible remap configurations are encoded and predefined
in a new stm32f1-afio.h dt-bindings include.

To match this new configuration, all stm32f1 -pinctrl.dtsi should
be regenerated to use these new remap definitions.

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