pmdomain: renesas: rcar-sysc: Remove rcar_sysc_nullify() helper

There are no more users left of the rcar_sysc_nullify() helper, so it
can be removed.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/ad61b09283cc8a9cf93a5ea9fffd1cb283b9db92.1713348705.git.geert+renesas@glider.beSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/pmdomain/renesas/rcar-sysc.c

@@ -439,18 +439,6 @@ static int __init rcar_sysc_pd_init(void)
 }
 early_initcall(rcar_sysc_pd_init);
 
-void __init rcar_sysc_nullify(struct rcar_sysc_area *areas,
-			      unsigned int num_areas, u8 id)
-{
-	unsigned int i;
-
-	for (i = 0; i < num_areas; i++)
-		if (areas[i].isr_bit == id) {
-			areas[i].name = NULL;
-			return;
-		}
-}
-
 #ifdef CONFIG_ARCH_R8A7779
 static int rcar_sysc_power_cpu(unsigned int idx, bool on)
 {

drivers/pmdomain/renesas/rcar-sysc.h

@@ -71,12 +71,4 @@ extern const struct rcar_sysc_info r8a77980_sysc_info;
 extern const struct rcar_sysc_info r8a77990_sysc_info;
 extern const struct rcar_sysc_info r8a77995_sysc_info;
 
-
-    /*
-     * Helpers for fixing up power area tables depending on SoC revision
-     */
-
-extern void rcar_sysc_nullify(struct rcar_sysc_area *areas,
-			      unsigned int num_areas, u8 id);
-
 #endif /* __SOC_RENESAS_RCAR_SYSC_H__ */