thunderbolt: select CRC32 in Kconfig

We use __crc32c_le in ctl.c. So make sure that the dependency is there.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>