- rcc_get_i2c_clk_freq: Add support by taking RCC_CCIPR2 into account for I2C4. - rcc_get_timer_clk_freq: Add support for LP timers - rcc_get_usart_clk_freq: Fix APB freq used for LPUART1 and UART1, respectively.
- rcc_get_i2c_clk_freq: Add support by taking RCC_CCIPR2 into account for I2C4. - rcc_get_timer_clk_freq: Add support for LP timers - rcc_get_usart_clk_freq: Fix APB freq used for LPUART1 and UART1, respectively.