coresight: trbe: Fix incorrect access of the sink specific data

The TRBE driver wrongly treats the aux private data as the TRBE driver
specific buffer for a given perf handle, while it is the ETM PMU's
event specific data. Fix this by correcting the instance to use
appropriate helper.

Cc: stable <[email protected]>
Fixes: 3fbf7f0 ("coresight: sink: Add TRBE driver")
Signed-off-by: Suzuki K Poulose <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[Fixed 13 character SHA down to 12]
Signed-off-by: Mathieu Poirier <[email protected]>

Author: Suzuki K Poulose

drivers/hwtracing/coresight/coresight-trbe.c

@@ -382,7 +382,7 @@ static unsigned long __trbe_normal_offset(struct perf_output_handle *handle)
 
 static unsigned long trbe_normal_offset(struct perf_output_handle *handle)
 {
-	struct trbe_buf *buf = perf_get_aux(handle);
+	struct trbe_buf *buf = etm_perf_sink_config(handle);
 	u64 limit = __trbe_normal_offset(handle);
 	u64 head = PERF_IDX2OFF(handle->head, buf);