moxa: Refer to LICENCE.moxa for mxuport driver

Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com>

WHENCE

@@ -2752,24 +2752,7 @@ File: moxa/moxa-1618.fw
 File: moxa/moxa-1653.fw
 File: moxa/moxa-1658.fw
 
-License: Redistributable.
-
-The software accompanying this license statement (the “Software”)
-is the property of Moxa Inc. (the “Moxa”), and is protected by
-United States and International Copyright Laws and International
-treaty provisions. No ownership rights are granted by this
-Agreement or possession of the Software. Therefore, you must treat
-the Licensed Software like any other copyrighted material. Your
-rights and obligations in its use are described as follows:
-
-1. You may freely redistribute this software under this license.
-2. You may freely download and use this software on Moxa's device.
-3. You may not modify or attempt to reverse engineer the software, or
-   make any attempt to change or even examine the source code of the
-   software.
-4. You may not re-license or sub-license the software to any person or
-   business, using any other license.
-5. Moxa(r) is worldwide registered trademark.
+License: Redistributable. See LICENSE.moxa for details
 
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