ARM: dts: stm32: stm32f7-pinctrl: don't use multiple blank lines

ARM: dts: stm32: stm32f7-pinctrl: don't use multiple blank lines

The patch fixes the following warning:

arch/arm/dts/stm32f7-pinctrl.dtsi:380: check: Please don't use multiple blank lines

Fixes: ba287d1a0137 ("ARM: dts: stm32: add pin map for LTDC on stm32f7")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Raphaël Gallais-Pou <raphael.gallais-pou@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>