boards: pico_spe: add vendor

add of vendor

Signed-off-by: Frank Bintakies <[email protected]>

Author: KwsBaer

dts/bindings/vendor-prefixes.txt

@@ -356,6 +356,7 @@ kontron	Kontron S&T AG
 kosagi	Sutajio Ko-Usagi PTE Ltd.
 kvaser	Kvaser
 kvg	Kverneland Group
+kws	KWS Computersysteme Gmbh
 kyo	Kyocera Corporation
 lacie	LaCie
 laird	Laird PLC