serial: max310x: Remove init() and exit() callbacks

These callbacks were previously used for the IC power initialization.
If this initialization will be needed in the future, it should be
implemented with the regulator API.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/platform_data/max310x.h

@@ -55,10 +55,6 @@ struct max310x_pdata {
 	const int		frequency;
 	/* GPIO base number (can be negative) */
 	const int		gpio_base;
-	/* Called during startup */
-	void (*init)(void);
-	/* Called before finish */
-	void (*exit)(void);
 };
 
 #endif