Add 'raspberrypi' connection type to HD44780 driver (by P. Corner).

server/drivers/hd44780-low.h

@@ -53,6 +53,7 @@
 #define HD44780_CT_USBLCD		19
 #define HD44780_CT_USBTINY		20
 #define HD44780_CT_USB4ALL		21
+#define HD44780_CT_RASPBERRYPI		22
 /**@}*/
 
 /** \name Symbolic names for interface types
@@ -104,7 +105,7 @@ typedef struct ConnectionMapping {
 	int if_type;
 	/** Pointer to connection type's initialization function */
 	int (*init_fn) (Driver *drvthis);
-}  ConnectionMapping;
+} ConnectionMapping;
 
 
 /**
@@ -153,6 +154,9 @@ typedef struct hd44780_private_data {
 #ifdef WITH_ETHLCD
 	int sock;		/**< socket for TCP devices */
 #endif
+#ifdef WITH_RASPBERRYPI
+	struct rpi_gpio_map *rpi_gpio;	/**< GPIO pin mapping for Raspberry Pi */
+#endif
 
 	int charmap;		/**< index of currently used charmap */