pinctrl: cy8c95x0: Fix off-by-one in the regmap range settings

The range_max is inclusive, so we need to use the number of
the last accessible register address.

Fixes: 8670de9 ("pinctrl: cy8c95x0: Use regmap ranges")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/20250203131506.3318201-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: andy-shev

drivers/pinctrl/pinctrl-cy8c95x0.c

@@ -1438,15 +1438,15 @@ static int cy8c95x0_probe(struct i2c_client *client)
 	switch (chip->tpin) {
 	case 20:
 		strscpy(chip->name, cy8c95x0_id[0].name);
-		regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 3 * MUXED_STRIDE;
+		regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 3 * MUXED_STRIDE - 1;
 		break;
 	case 40:
 		strscpy(chip->name, cy8c95x0_id[1].name);
-		regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 6 * MUXED_STRIDE;
+		regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 6 * MUXED_STRIDE - 1;
 		break;
 	case 60:
 		strscpy(chip->name, cy8c95x0_id[2].name);
-		regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 8 * MUXED_STRIDE;
+		regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 8 * MUXED_STRIDE - 1;
 		break;
 	default:
 		return -ENODEV;