mv64361: Add dummy gigabit ethernet PHY access registers

We don't emulate the gigabit ethernet part of the chip but the MorphOS
driver accesses these and expects to get some valid looking result
otherwise it hangs. Add some minimal dummy implementation to avoid rhis.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Acked-by: Cédric Le Goater <clg@kaod.org>
Message-ID: <20230605215145.29458746335@zero.eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

hw/pci-host/mv64361.c

@@ -541,6 +541,12 @@ static uint64_t mv64361_read(void *opaque, hwaddr addr, unsigned int size)
             }
         }
         break;
+    case MV64340_ETH_PHY_ADDR:
+        ret = 0x98;
+        break;
+    case MV64340_ETH_SMI:
+        ret = BIT(27);
+        break;
     case MV64340_CUNIT_ARBITER_CONTROL_REG:
         ret = 0x11ff0000 | (s->gpp_int_level << 10);
         break;

hw/pci-host/mv643xx.h

@@ -656,6 +656,9 @@
 /*        Ethernet Unit Registers       */
 /****************************************/
 
+#define MV64340_ETH_PHY_ADDR                                        0x2000
+#define MV64340_ETH_SMI                                             0x2004
+
 /*******************************************/
 /*          CUNIT  Registers               */
 /*******************************************/