perf parse-events: Fix driver config term

Inadvertently deleted in commit 30f4ade ("perf tools: Revert
enable indices setting syntax for BPF map").

Fixes: 30f4ade ("perf tools: Revert enable indices setting syntax for BPF map")
Reported-by: James Clark <james.clark@arm.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20230905033805.3094293-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/parse-events.y

@@ -839,6 +839,23 @@ PE_TERM
 
 	$$ = term;
 }
+|
+PE_DRV_CFG_TERM
+{
+	struct parse_events_term *term;
+	char *config = strdup($1);
+	int err;
+
+	if (!config)
+		YYNOMEM;
+	err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG, config, $1, &@1, NULL);
+	if (err) {
+		free($1);
+		free(config);
+		PE_ABORT(err);
+	}
+	$$ = term;
+}
 
 sep_dc: ':' |