msm: tracing: disable tracing for the RTB log functions

The function graph tracer causes a kernel crash when enabled. The
counter_get_cntvct_mem and uncached_logk functions call each other
recursively causing a kernel stack overflow. Fix this by annotating
RTB log functions with notrace.

Signed-off-by: Sarang Joshi <spjoshi@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>