staging: wilc1000: remove function pointer io_init

This patch removes function pointer io_init of wilc_wlan_io_func_t and it's
related codes, and call the function linux_spi_init directly.
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_wlan.c

@@ -892,11 +892,9 @@ void linux_to_wlan(wilc_wlan_inp_t *nwi, struct wilc *nic)
 
 #ifdef WILC_SDIO
 	nwi->io_func.io_type = HIF_SDIO;
-	nwi->io_func.io_init = linux_sdio_init;
 	nwi->io_func.io_deinit = linux_sdio_deinit;
 #else
 	nwi->io_func.io_type = HIF_SPI;
-	nwi->io_func.io_init = linux_spi_init;
 	nwi->io_func.io_deinit = linux_spi_deinit;
 #endif
 }

drivers/staging/wilc1000/wilc_spi.c

@@ -966,11 +966,9 @@ static int wilc_spi_init(wilc_wlan_inp_t *inp, wilc_debug_func func)
 
 	g_spi.dPrint = func;
 	g_spi.os_context = inp->os_context.os_private;
-	if (inp->io_func.io_init) {
-		if (!inp->io_func.io_init(g_spi.os_context)) {
-			PRINT_ER("[wilc spi]: Failed io init bus...\n");
-			return 0;
-		}
+	if (!linux_spi_init(g_spi.os_context)) {
+		PRINT_ER("[wilc spi]: Failed io init bus...\n");
+		return 0;
 	} else {
 		return 0;
 	}

drivers/staging/wilc1000/wilc_wlan_if.h

@@ -74,7 +74,6 @@ typedef struct {
 
 typedef struct {
 	int io_type;
-	int (*io_init)(void *);
 	void (*io_deinit)(void *);
 } wilc_wlan_io_func_t;