include: dt-bindings: clock: add LTDC specific entry for stm32mp13

The non-secure LTDC plane has its own register for clock gating hence
add an entry to control this.

Signed-off-by: Alain Volmat <[email protected]>

Author: Alain Volmat

include/zephyr/dt-bindings/clock/stm32mp13_clock.h

@@ -13,6 +13,7 @@
 #define STM32_CLOCK_BUS_APB2    0x708
 #define STM32_CLOCK_BUS_APB3    0x710
 #define STM32_CLOCK_BUS_APB4    0x728
+#define STM32_CLOCK_BUS_APB4_LTDC_NS 0x738
 #define STM32_CLOCK_BUS_APB5    0x740
 #define STM32_CLOCK_BUS_APB6    0x748
 #define STM32_CLOCK_BUS_AHB2    0x750