extcon: adc-jack: Add missing MODULE_LICENSE

This driver can be built as a module, add MODULE_LICENSE for it.
For completeness, also adds MODULE_AUTHOR and MODULE_DESCRIPTION.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
1 file changed