linux-firmware: add t4fw-1.4.16.0.bin firmware for cxgb4 driver.

Update t4fw.bin symlink to point the the latest firmware.
Signed-off-by: Divy Le Ray <divy@chelsio.com>

WHENCE

@@ -542,6 +542,7 @@ Found in hex form in kernel source.
 Driver: cxgb4 - Chelsio Terminator 4 1G/10G Ethernet adapter
 
 File: cxgb4/t4fw-1.3.10.0.bin
+File: cxgb4/t4fw-1.4.16.0.bin
 
 Licence: Redistributable. See LICENCE.chelsio_firmware for details
 

cxgb4/t4fw.bin

-t4fw-1.3.10.0.bin
\ No newline at end of file
+t4fw-1.4.16.0.bin
\ No newline at end of file