dev-arm: Don't use args and kwargs on attachIO

This is matching the attachOnChipIO style, and fixing the error of the
dma_ports kwarg being forwarded to the _attach_mem

Change-Id: Ib3ecf2fc18c488d938bbbf63eab3d7693cdb7d06
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27086
Tested-by: Gem5 Cloud Project GCB service account <345032938727@cloudbuild.gserviceaccount.com>
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>

src/dev/arm/RealView.py

@@ -625,9 +625,9 @@ class RealView(Platform):
         if bridge:
             bridge.ranges = self._off_chip_ranges
 
-    def attachIO(self, *args, **kwargs):
-        self._attach_mem(self._off_chip_memory(), *args, **kwargs)
-        self._attach_io(self._off_chip_devices(), *args, **kwargs)
+    def attachIO(self, bus, dma_ports=None, mem_ports=None):
+        self._attach_mem(self._off_chip_memory(), bus, mem_ports)
+        self._attach_io(self._off_chip_devices(), bus, dma_ports)
 
     def setupBootLoader(self, cur_sys, boot_loader, atags_addr, load_offset):
         cur_sys.workload.boot_loader = boot_loader