Disable sllin driver(using HVAC apps) debug log

Disable sllin driver(using HVAC apps) debug log

[   30.042717] sllin: sllin_open() invoked
[   30.046603] sllin: Configured as MASTER
[   30.051508] sllin: Baudrate set to 9600
[   30.056332] sllin0 (uninitialized): sllin_kwthread started.
[   30.062486] sllin0: sllin_kthread <WAIT_EVENT>
[   31.153606] sllin0: sll_open() invoked
[   31.271843] can: raw protocol (rev 20170425)
[   31.276821] sllin0: sllin_kthread <WAKEUPED>
[   31.281124] sllin0: sllin_kthread: lin_state <00000000>
[   31.286370] sllin0: sllin_kwthread: NON-RTR SFF CAN frame, ID = 30
                dlc=0
[   31.286390] sllin0: sllin_kthread: SLSTATE finish
[   31.299297] sllin0: sllin_send_break() invoke.
[   31.305566] sllin0: Break sent.
[   31.308743] sllin0: sllin_kthread <WAIT_EVENT>

Change-Id: Id49951cb1ed570c99eb11d19298c1e5b57bcf13c
Signed-off-by: Yuichi Kusakabe <yuichi.kusakabe@denso-ten.com>