package/dahdi-linux: bump to version 3.0.0

Fix build with kernel >= 4.13 thanks to
https://github.com/asterisk/dahdi-linux/commit/d4e232a776ee27eb04aed3cbd72a203118dbe9f1

Fixes:
 - https://bugs.buildroot.org/show_bug.cgi?id=11921



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