gpio: max7300: Fix trivial typo in Kconfig help text

max7301 is controlled through SPI interface which means another driver.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/Kconfig

@@ -330,7 +330,7 @@ config GPIO_MAX7300
 	depends on I2C
 	select GPIO_MAX730X
 	help
-	  GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
+	  GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
 
 config GPIO_MAX732X
 	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"