Power: remove support for Freescale MPC8220

The Freescale MPC8220 Power Architecture processors have long reached
EOL; Freescale does not even list these any more on their web site.

Remove the code to avoid wasting maitaining efforts on dead stuff.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Andy Fleming <afleming@gmail.com>
diff --git a/doc/driver-model/UDM-pci.txt b/doc/driver-model/UDM-pci.txt
index c2cf2d5..6a592b3 100644
--- a/doc/driver-model/UDM-pci.txt
+++ b/doc/driver-model/UDM-pci.txt
@@ -201,11 +201,7 @@
     -----------------------------
       Standard driver, uses indirect functions.
 
-    12) powerpc/cpu/mpc8220/pci.c
-    -----------------------------
-      Standard driver, specifies all read/write functions separately.
-
-    13) powerpc/cpu/mpc85xx/pci.c
+    12) powerpc/cpu/mpc85xx/pci.c
     -----------------------------
       Standard driver, uses indirect functions, has two busses.