serial: Remove ioregister parameter from serial_mm_init

All callers passed 1.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/hw/ppce500_mpc8544ds.c b/hw/ppce500_mpc8544ds.c
index c3583f9..fc46991 100644
--- a/hw/ppce500_mpc8544ds.c
+++ b/hw/ppce500_mpc8544ds.c
@@ -276,13 +276,13 @@
     if (serial_hds[0]) {
         serial_mm_init(MPC8544_SERIAL0_REGS_BASE,
                        0, mpic[12+26], 399193,
-                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
+                       serial_hds[0], DEVICE_BIG_ENDIAN);
     }
 
     if (serial_hds[1]) {
         serial_mm_init(MPC8544_SERIAL1_REGS_BASE,
                        0, mpic[12+26], 399193,
-                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
+                       serial_hds[0], DEVICE_BIG_ENDIAN);
     }
 
     /* General Utility device */