dts/bindings: st,stm32-can: Add optional master-can property

In STM32 can driver CAN2 instance need to know the base address
of CAN1 instance which is referenced as master can.
Add this information as an optional property to stm32 can binding.

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