MAINTAINERS: Add a missing entry to the SPARC CPU

Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20181125205000.10324-3-philmd@redhat.com>
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>

MAINTAINERS

@@ -291,6 +291,7 @@ S: Maintained
 F: target/sparc/
 F: hw/sparc/
 F: hw/sparc64/
+F: include/hw/sparc/sparc64.h
 F: disas/sparc.c
 
 UniCore32