hsu: do not write to console when emmc_ipanic

hsu: do not write to console when emmc_ipanic

BZ: 30826

When emmc_ipanic happens, panic logs will be keeping output to
console for more than 15 senconds, then watchdog will be triggered.
This causes kernel unable to save the log to emmc. This patch fixes
this issue by stop writing logs to console when emmc_ipanic.

Change-Id: I1482c79116cad0c590ff64ef4c273a5dc3eba071
Signed-off-by: Li, Ning <ning.li@intel.com>
Reviewed-on: http://android.intel.com:8080/43066
Reviewed-by: Zhang, Shijie <shijie.zhang@intel.com>
Reviewed-by: Yang, Bin <bin.yang@intel.com>
Reviewed-by: Du, Alek <alek.du@intel.com>
Tested-by: Wang, Zhifeng <zhifeng.wang@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>