asterisk-chan-lantiq: import patches improving log output

[dangowrt]

Maintainer: @jslachta Compile tested: lantiq/xrx200 (mips_24kc) Run tested: arcadyan,vgv7510kw22-nor Description:

Output channel state in log message if a digit ends up not being handled. Report USER_BUSY as cause in case a phone is not on hook while being called.

Signed-off-by: Daniel Golle daniel@makrotopia.org (cherry picked from commit d1123a245b5a21f3520e2c3d4ad1bfab82a52a9a)

[jslachta]

Thank you, Daniel!