package/wilink-bt-firmware: bump to version 43fca73c6a98c63fcb98f82af5bf83761778e005

- Switch site to git.ti.com
- Add hash for license file (and change filename to LICENSE, there is
  only a change in the site URL between old and new file)
- Fix path

Fixes:
 - https://bugs.buildroot.org/show_bug.cgi?id=11946



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>