Staging: slicoss: add binary firmware to firmware directory

Adds the firmware to the firmware directory in ihex format so it can be
installed when doing make firmware_install.

Also update the firmware location in the driver code so it can locate
the files in the right place.

This should conclude the move to request_firmware().

Signed-off-by: Lior Dotan <liodot@gmail.com>
Cc: Christopher Harrer <charrer@alacritech.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

WHENCE

@@ -364,6 +364,20 @@ Found in hex form in kernel source.
 
 --------------------------------------------------------------------------
 
+Driver: SLICOSS - Alacritech IS-NIC products
+
+File: slicoss/gbdownload.sys.ihex
+File: slicoss/gbrcvucode.sys.ihex
+File: slicoss/oasisdbgdownload.sys.ihex
+File: slicoss/oasisdownload.sys.ihex
+File: slicoss/oasisrcvucode.sys.ihex
+
+Licence: Unknown
+
+Found in hex form in kernel source.
+
+--------------------------------------------------------------------------
+
 Driver: cxgb3 - Chelsio Terminator 3 1G/10G Ethernet adapter
 
 File: cxgb3/t3b_psram-1.1.0.bin.ihex