package/wpa_supplicant: bump version to 2.7

Removed upstream patches included in the new version.
Added upstream patch to fix build error.

Updated license hash after commit
http://w1.fi/cgit/hostap/commit/README?id=c2c6c01bb8b6fafc2074b46a53c4eab2c145ac6f


updated the copyright year.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>