pmdomain: renesas: Adjust the waiting time to cover the worst case

Description in HWM rev0.51E, 9.4 Usage notes, page 455 tells

	"It takes several hundreds of microseconds to shutting off and
	 resuming power domain. Because actual time required for
	 shutting off and resuming depends on the status of on-board
	 power line, shutoff/resume time is not guaranteed by
	 electrical specification"

Let's assume the safe value of waiting is about 1000us.

Signed-off-by: Dien Pham <dien.pham.ry@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Tho Vu <tho.vu.wh@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/8734tx8b18.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/pmdomain/renesas/rcar-sysc.c

@@ -45,10 +45,10 @@
 #define PWRER_OFFS		0x14	/* Power Shutoff/Resume Error */
 
 
-#define SYSCSR_TIMEOUT		100
+#define SYSCSR_TIMEOUT		1000
 #define SYSCSR_DELAY_US		1
 
-#define PWRER_RETRIES		100
+#define PWRER_RETRIES		1000
 #define PWRER_DELAY_US		1
 
 #define SYSCISR_TIMEOUT		1000