mfd: axp20x: Fix axp288 writable-ranges

Register AXP288_POWER_REASON is writable and needs to be written
to reset the reset- / power-on-reason bits.

Add it to the axp288 writable-ranges so that the extcon-axp288
driver can properly clear the reset- / power-on-reason bits.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230329205544.1051393-1-hdegoede@redhat.com

drivers/mfd/axp20x.c

@@ -119,6 +119,7 @@ static const struct regmap_access_table axp22x_volatile_table = {
 
 /* AXP288 ranges are shared with the AXP803, as they cover the same range */
 static const struct regmap_range axp288_writeable_ranges[] = {
+	regmap_reg_range(AXP288_POWER_REASON, AXP288_POWER_REASON),
 	regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ6_STATE),
 	regmap_reg_range(AXP20X_DCDC_MODE, AXP288_FG_TUNE5),
 };