This patch introduces PLL_I2S and PLL_SAI.
Vco clock of these PLLs can be modify by DT (only n multiplicator,
m divider is still fixed by the boot-loader).
Each PLL has 3 dividers. PLL should be off when we modify the rate.
Signed-off-by: NGabriel Fernandez <gabriel.fernandez@st.com>
Acked-by: NRob Herring <robh@kernel.org>
[sboyd@codeaurora.org: Mark stm32f4_pll_div_ops static]
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>