wl18xx: update firmware file

- Firmware file was updated (8.9.0.1.55), includes bug fixes and improvements.
- LICENCE file update
Signed-off-by: Yaniv Machani <yanivma@ti.com>

LICENCE.ti-connectivity

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WHENCE

@@ -2153,7 +2153,7 @@ Version: 8.5.0.0.55
 File: ti-connectivity/wl18xx-fw-3.bin
 Version: 8.8.0.0.13
 File: ti-connectivity/wl18xx-fw-4.bin
-Version: 8.9.0.0.39
+Version: 8.9.0.1.55
 
 Licence: Redistributable. See LICENCE.ti-connectivity for details.