MAINTAINERS: add an entry for the i82378 (superio)

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

MAINTAINERS

@@ -732,6 +732,7 @@ F: hw/ppc/prep.c
 F: hw/ppc/prep_systemio.c
 F: hw/ppc/rs6000_mc.c
 F: hw/pci-host/prep.[hc]
+F: hw/isa/i82378.c
 F: hw/isa/pc87312.[hc]
 F: hw/dma/i82374.c
 F: pc-bios/ppc_rom.bin