hw/arm/aspeed: directly map the serial device to the system address space

hw/arm/aspeed: directly map the serial device to the system address space

(qemu) info mtree
 address-space: cpu-memory-0
   0000000000000000-ffffffffffffffff (prio 0, i/o): system
     0000000000000000-0000000007ffffff (prio 0, rom): aspeed.boot_rom
     000000001e600000-000000001e7fffff (prio -1, i/o): aspeed_soc.io
-      000000001e784000-000000001e78401f (prio 0, i/o): serial
     000000001e620000-000000001e6200ff (prio 0, i/o): aspeed.smc.ast2500-fmc
     000000001e630000-000000001e6300ff (prio 0, i/o): aspeed.smc.ast2500-spi1
     [...]
     000000001e720000-000000001e728fff (prio 0, ram): aspeed.sram
     000000001e782000-000000001e782fff (prio 0, i/o): aspeed.timer
+    000000001e784000-000000001e78401f (prio 0, i/o): serial
     000000001e785000-000000001e78501f (prio 0, i/o): aspeed.wdt
     000000001e785020-000000001e78503f (prio 0, i/o): aspeed.wdt

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Message-id: 20180209085755.30414-2-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>