power: reset: qcom-pon: reg write mask depends on pon generation

Instead of hardcode the mask, it should be depends
on which generation of pon it was.

Signed-off-by: Kejia Hu <[e-mail]>
Fixes: fce5430f6a86 ("reset: qcom-pon: Add support for gen2 pon")
Signed-off-by: Sebastian Reichel <[e-mail]>

drivers/power/reset/qcom-pon.c

···
 
 	ret = regmap_update_bits(pon->regmap,
 				 pon->baseaddr + PON_SOFT_RB_SPARE,
-				 0xfc, magic << pon->reason_shift);
+				 GENMASK(7, pon->reason_shift),
+				 magic << pon->reason_shift);
 	if (ret < 0)
 		dev_err(pon->dev, "update reboot mode bits failed\n");