mnh_pcie_ep: Initialize the trace_lock spin lock properly

debug_memory build complains "BUG: spinlock bad magic on CPU#0"
without this change.

Bug: 111245985
Change-Id: I5350deb0b2f347917ee45c2cb5147db265f3314f
Signed-off-by: Chen-hao Chang <haocc@google.com>
1 file changed