msm ipa: showing IPA debugfs info in serial port

enable debugfs msg to show in serial port because
in Android platform, dynamic change klogd is not
available. Change pr_info to pr_err instead.

Change-Id: Ib30a70064cfbbff8476d7a634ef3ee50c4a40b31
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>