auxdisplay: hd44780: Introduce hd44780_common_free()

Introduce hd44780_common_free() for symmetrical operation
to hd44780_common_alloc(). It will allow to modify both
in the future without touching the users.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>

Author: andy-shev

drivers/auxdisplay/hd44780_common.c

@@ -366,5 +366,11 @@ struct hd44780_common *hd44780_common_alloc(void)
 }
 EXPORT_SYMBOL_GPL(hd44780_common_alloc);
 
+void hd44780_common_free(struct hd44780_common *hd)
+{
+	kfree(hd);
+}
+EXPORT_SYMBOL_GPL(hd44780_common_free);
+
 MODULE_DESCRIPTION("Common functions for HD44780 (and compatibles) LCD displays");
 MODULE_LICENSE("GPL");

drivers/auxdisplay/hd44780_common.h

@@ -30,4 +30,6 @@ int hd44780_common_blink(struct charlcd *lcd, enum charlcd_onoff on);
 int hd44780_common_fontsize(struct charlcd *lcd, enum charlcd_fontsize size);
 int hd44780_common_lines(struct charlcd *lcd, enum charlcd_lines lines);
 int hd44780_common_redefine_char(struct charlcd *lcd, char *esc);
+
 struct hd44780_common *hd44780_common_alloc(void);
+void hd44780_common_free(struct hd44780_common *hd);