perf report: Update document for SIMD flags

Update SIMD architecture and predicate flags.

Reviewed-by: James Clark <james.clark@linaro.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

tools/perf/Documentation/perf-report.txt

@@ -136,7 +136,10 @@ OPTIONS
 	- addr: (Full) virtual address of the sampled instruction
 	- retire_lat: On X86, this reports pipeline stall of this instruction compared
 	  to the previous instruction in cycles. And currently supported only on X86
-	- simd: Flags describing a SIMD operation. "e" for empty Arm SVE predicate. "p" for partial Arm SVE predicate
+	- simd: Flags describing a SIMD operation. The architecture type can be Arm's
+	  ASE (Advanced SIMD extension), SVE, SME. It provides an extra tag for
+	  predicate: "e" for empty predicate, "p" for partial predicate, "d" for
+	  predicate disabled, and "f" for full predicate.
 	- type: Data type of sample memory access.
 	- typeoff: Offset in the data type of sample memory access.
 	- symoff: Offset in the symbol.