drivers: clock control: stm32 pll clock config for I2S

The stm32F41x have a PLLI2S M divider for their PLL I2S
but others like the stm32F401 or stm32F74x have the PLL M
divider from the main PLL : might affect the sysclock.
LL Function is the same for configuring the PLL I2S but
parameter could depends on the stm32 serie.

Signed-off-by: Francois Ramu <francois.ramu@st.com>