staging: rtl8188eu: clean up usb_write32

Remove unnecessary variable, summarize declaration and assignment.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210406204829.18130-10-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c

@@ -503,15 +503,10 @@ int usb_write16(struct adapter *adapter, u32 addr, u16 val)
 
 int usb_write32(struct adapter *adapter, u32 addr, u32 val)
 {
-	u16 wvalue;
+	u16 wvalue = (u16)(addr & 0xffff);
-	u16 len;
+	__le32 data = cpu_to_le32(val);
-	__le32 data;
 
-	wvalue = (u16)(addr & 0x0000ffff);
+	return usbctrl_vendorreq(adapter, wvalue, &data, 4, REALTEK_USB_VENQT_WRITE);
-	len = 4;
-	data = cpu_to_le32(val);
-
-	return usbctrl_vendorreq(adapter, wvalue, &data, len, REALTEK_USB_VENQT_WRITE);
 }
 
 static void usb_write_port_complete(struct urb *purb, struct pt_regs *regs)