perf maps: Rename map_groups.h to maps.h

One more step in the merge of 'struct maps' with 'struct map_groups'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-9ibtn3vua76f934t7woyf26w@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -23,7 +23,7 @@
 #include "dso.h"
 #include "env.h"
 #include "map.h"
-#include "map_groups.h"
+#include "maps.h"
 #include "symbol.h"
 #include "srcline.h"
 #include "units.h"