msm: fix in-tree compilation for perf_trace_counters

In-tree compilation for arch/arm/mach-msm/perf_trace_counters.c was
hitting this error:

    In file included from arch/arm/mach-msm/perf_trace_counters.h:127:0,
                     from arch/arm/mach-msm/perf_trace_counters.c:14:
    include/trace/define_trace.h:79:43: fatal error: ./perf_trace_counters.h: No such file or directory

Instructions for TRACE_INCLUDE_FILE in include/trace/define_trace.h say
"the path is relative to define_trace.h, not the file including it".
Fix in-tree compilation by making the path relative to define_trace.h.

Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
diff --git a/arch/arm/mach-msm/perf_trace_counters.h b/arch/arm/mach-msm/perf_trace_counters.h
index ce7e336..8f77bad 100644
--- a/arch/arm/mach-msm/perf_trace_counters.h
+++ b/arch/arm/mach-msm/perf_trace_counters.h
@@ -121,7 +121,6 @@
 
 #endif
 #undef TRACE_INCLUDE_PATH
-#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_PATH ../../arch/arm/mach-msm
 #define TRACE_INCLUDE_FILE perf_trace_counters
 #include <trace/define_trace.h>
-