include: dt-bindings: regulator: nrf5x: Fix guards

Fix the include guard mismatch. Found building with clang.

Signed-off-by: Carles Cufi <[email protected]>

Author: carlescufi

include/zephyr/dt-bindings/regulator/nrf5x.h

@@ -4,7 +4,7 @@
  */
 
 #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_REGULATOR_NRF5X_H_
-#define ZEPHYR_INCLUDE_DT_BINDINGS_REGULATOR_NRF_H_
+#define ZEPHYR_INCLUDE_DT_BINDINGS_REGULATOR_NRF5X_H_
 
 /**
  * @defgroup regulator_nrf5x nRF5X regulator devicetree helpers.