Fix the breakage of log_pstore function

Fix the breakage of log_pstore function

Ramoops does not work after adding annotation
Total memory size exceeds the oriGinal 2M
Reduce the ftrace_size to fix the problem

Change-Id: I9f0a140e653bb08644201a855cad65e381214cc1
Signed-off-by: a17671 <a17671@motorola.com>
Reviewed-on: https://gerrit.mot.com/1243000
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Master Yoda
Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com>
Submit-Approved: Jira Key