Add GPIO driver support for STM32L1X SoC series. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Add STM32L1 SoC series support with STM32L15XXB as the target SoC. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>