extcon: max77843: Replace irqchip mask_invert with unmask_base

Remove use of the deprecated mask_invert flag. Inverted mask
registers (where a '1' bit enables an IRQ) can be described more
directly as an unmask register.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Author: Aidan MacDonald

drivers/extcon/extcon-max77843.c

@@ -189,8 +189,7 @@ static const struct regmap_irq max77843_muic_irq[] = {
 static const struct regmap_irq_chip max77843_muic_irq_chip = {
 	.name           = "max77843-muic",
 	.status_base    = MAX77843_MUIC_REG_INT1,
-	.mask_base      = MAX77843_MUIC_REG_INTMASK1,
-	.mask_invert    = true,
+	.unmask_base    = MAX77843_MUIC_REG_INTMASK1,
 	.num_regs       = 3,
 	.irqs           = max77843_muic_irq,
 	.num_irqs       = ARRAY_SIZE(max77843_muic_irq),