qca2: Update to new upstream version 2.1.0.

This also removes qca2_ossl, because it's now bundled with the main QCA
package and we can now drop all those patches and build system fixes,
because they have switched from autotools to cmake.

Tested against a few builds like PSI and Tomahawk.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>