edgeport-ti: use request_firmware()

Firmware blob looks like this...
        uint8_t  MajorVersion
        uint8_t  MinorVersion
        __le16   BuildNumber
        uint8_t  data[]
Signed-off-by: Jaswinder Singh <jaswinder@infradead.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

WHENCE

@@ -293,3 +293,19 @@ Licence: Allegedly GPLv2+, but no source visible. Marked:
 Found in hex form in kernel source.
 
 --------------------------------------------------------------------------
+
+Driver: USB_SERIAL_EDGEPORT_TI - USB Inside Out Edgeport Serial Driver
+(TI Devices)
+
+File: edgeport/down3.bin
+
+Licence:
+//**************************************************************
+//* Edgeport Binary Image (for TI based products)
+//* Generated by TIBin2C v2.00 (watchport)
+//* Copyright (C) 2001 Inside Out Networks, All rights reserved.
+//**************************************************************
+
+Found in hex form in kernel source.
+
+--------------------------------------------------------------------------