arch/arm/src/stm32f7/stm32_ltdc.h, arch/arm/src/stm32f7/stm32_pm.h, arch/arm/src/stm32f7/stm32_pmsleep.c, arch/arm/src/stm32f7/stm32_pmstandby.c, arch/arm/src/stm32f7/stm32_pmstop.c, arch/arm/src/stm32f7/stm32_pwm.h: * Fix nxstyle errors.
arch/arm/src/stm32f7/stm32_ltdc.h, arch/arm/src/stm32f7/stm32_pm.h, arch/arm/src/stm32f7/stm32_pmsleep.c, arch/arm/src/stm32f7/stm32_pmstandby.c, arch/arm/src/stm32f7/stm32_pmstop.c, arch/arm/src/stm32f7/stm32_pwm.h: * Fix nxstyle errors.