dts/bindings: clocks: Add STM32F1 PLL bindings

Add PLL bindings for STM32F1 devices.
- Main PLL binding for STM32F1 non connectivity lines
- Main and PLL2 binding for Connectivity lines (F105/F107)

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