rtlwifi: Remove unused _usb_nbytes_read_write and _usb_writeN_sync

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtlwifi/wifi.h b/drivers/net/wireless/rtlwifi/wifi.h
index 31b3be9..3126485 100644
--- a/drivers/net/wireless/rtlwifi/wifi.h
+++ b/drivers/net/wireless/rtlwifi/wifi.h
@@ -942,10 +942,8 @@
 	unsigned long pci_base_addr;	/*device I/O address */
 
 	void (*write8_async) (struct rtl_priv *rtlpriv, u32 addr, u8 val);
-	void (*write16_async) (struct rtl_priv *rtlpriv, u32 addr, u16 val);
-	void (*write32_async) (struct rtl_priv *rtlpriv, u32 addr, u32 val);
-	int (*writeN_async) (struct rtl_priv *rtlpriv, u32 addr, u16 len,
-			     u8 *pdata);
+	void (*write16_async) (struct rtl_priv *rtlpriv, u32 addr, __le16 val);
+	void (*write32_async) (struct rtl_priv *rtlpriv, u32 addr, __le32 val);
 
 	u8(*read8_sync) (struct rtl_priv *rtlpriv, u32 addr);
 	u16(*read16_sync) (struct rtl_priv *rtlpriv, u32 addr);