[review] drivers: regulator: print regulator tree summary

Stub regulator_print_tree() when CFG_DRIVERS_REGULATOR is disabled.

Signed-off-by: Etienne Carriere <[email protected]>

core/include/drivers/regulator.h

@@ -317,6 +317,11 @@ TEE_Result regulator_supported_voltages(struct regulator *regulator,
 					struct regulator_voltages **voltages);
 
 /* Print current regulator tree summary to output console  (info trace level) */
+#ifdef CFG_DRIVERS_REGULATOR
 void regulator_print_tree(void);
-
+#else
+static inline void regulator_print_tree(void)
+{
+}
+#endif /* CFG_DRIVERS_REGULATOR */
 #endif /* __DRIVERS_REGULATOR_H */