MAINTAINERS: Improve the PowerPC machines section

Add some documentation files to the corresponding machine sections
and mention the machine names in the section titles where it is
not so obvious (e.g. that "taihu" is a 405 machine).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20220105104800.407570-1-thuth@redhat.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

MAINTAINERS

@@ -1245,7 +1245,7 @@ F: hw/openrisc/openrisc_sim.c
 
 PowerPC Machines
 ----------------
-405
+405 (ref405ep and taihu)
 L: qemu-ppc@nongnu.org
 S: Orphan
 F: hw/ppc/ppc405_boards.c
@@ -1281,6 +1281,7 @@ New World (mac99)
 M: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
 L: qemu-ppc@nongnu.org
 S: Odd Fixes
+F: docs/system/ppc/powermac.rst
 F: hw/ppc/mac_newworld.c
 F: hw/pci-host/uninorth.c
 F: hw/pci-bridge/dec.[hc]
@@ -1299,6 +1300,7 @@ Old World (g3beige)
 M: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
 L: qemu-ppc@nongnu.org
 S: Odd Fixes
+F: docs/system/ppc/powermac.rst
 F: hw/ppc/mac_oldworld.c
 F: hw/pci-host/grackle.c
 F: hw/misc/macio/
@@ -1312,6 +1314,7 @@ PReP
 M: Hervé Poussineau <hpoussin@reactos.org>
 L: qemu-ppc@nongnu.org
 S: Maintained
+F: docs/system/ppc/prep.rst
 F: hw/ppc/prep.c
 F: hw/ppc/prep_systemio.c
 F: hw/ppc/rs6000_mc.c
@@ -1324,7 +1327,7 @@ F: include/hw/isa/pc87312.h
 F: include/hw/rtc/m48t59.h
 F: tests/avocado/ppc_prep_40p.py
 
-sPAPR
+sPAPR (pseries)
 M: Cédric Le Goater <clg@kaod.org>
 M: Daniel Henrique Barboza <danielhb413@gmail.com>
 R: David Gibson <david@gibson.dropbear.id.au>
@@ -1336,8 +1339,8 @@ F: include/hw/*/spapr*
 F: hw/*/xics*
 F: include/hw/*/xics*
 F: pc-bios/slof.bin
-F: docs/specs/ppc-spapr-hcalls.txt
-F: docs/specs/ppc-spapr-hotplug.txt
+F: docs/system/ppc/pseries.rst
+F: docs/specs/ppc-spapr-*
 F: tests/qtest/spapr*
 F: tests/qtest/libqos/*spapr*
 F: tests/qtest/rtas*
@@ -1348,6 +1351,7 @@ PowerNV (Non-Virtualized)
 M: Cédric Le Goater <clg@kaod.org>
 L: qemu-ppc@nongnu.org
 S: Maintained
+F: docs/system/ppc/powernv.rst
 F: hw/ppc/pnv*
 F: hw/intc/pnv*
 F: hw/intc/xics_pnv.c