firmware: convert tg3 driver to request_firmware()

Firmware blob looks like this...
        u8 firmware_major
        u8 firmware_minor
        u8 firmware_fix
        u8 pad
        __be32 start_address
        __be32 length (total, including BSS sections to be zeroed)
        data... (in __be32 words, which is native for the firmware)

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

WHENCE

@@ -371,3 +371,22 @@ Found in hex form in kernel source, but source allegedly available at
 http://alteon.shareable.org/
 
 --------------------------------------------------------------------------
+
+Driver: tigon3 -- Broadcom Tigon3 based gigabit Ethernet cards
+
+File: tigon/tg3.bin
+File: tigon/tg3_tso.bin
+File: tigon/tg3_tso5.bin
+
+Licence:
+ * Firmware is:
+ *	Derived from proprietary unpublished source code,
+ *	Copyright (C) 2000-2003 Broadcom Corporation.
+ *
+ *	Permission is hereby granted for the distribution of this firmware
+ *	data in hexadecimal or equivalent format, provided this copyright
+ *	notice is accompanying it.
+
+Found in hex form in kernel source.
+
+--------------------------------------------------------------------------