soc: renesas: rcar-sysc: Use [] to denote a flexible array member

Flexible array members should be denoted using [] instead of [0], else
gcc will not warn when they are no longer at the end of the structure.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>

drivers/soc/renesas/rcar-sysc.c

@@ -170,7 +170,7 @@ struct rcar_sysc_pd {
 	struct generic_pm_domain genpd;
 	struct rcar_sysc_ch ch;
 	unsigned int flags;
-	char name[0];
+	char name[];
 };
 
 static inline struct rcar_sysc_pd *to_rcar_pd(struct generic_pm_domain *d)