dt-bindings: clk: stm32h7: fix clock-cell size

The clock-cell size is 1 on stm32h7 plaform.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Fixes: 3e4d618b0722 ("clk: stm32h7: Add stm32h743 clock driver")
Signed-off-by: Rob Herring <robh@kernel.org>

clk: stm32h7: Add stm32h743 clock driver

This patch enables clocks for STM32H743 boards.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>

for MFD changes:
Acked-by: Lee Jones <lee.jones@linaro.org>

for DT-Bindings
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>