tty: n_smux: Log error messages to internal log
tty: n_smux: Log error messages to internal log

If an error occurs, log to both the kernel log and the internal SMUX log
to aid debugging.

Change-Id: I35f7a8e44401b6c16c0d05fd9ef3368158075b77
Signed-off-by: Eric Holmberg <5000aa55685d659e1f7f26ece526f9c7021ab484@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas