Restore safe defaults

Detail:
  Ideally, $Machine would only exist within Hdr:Machine, they define a class of machines which in turn requires the lowest common denominator. It doesn't encode any capabilities about the class (eg. amount of memory, screen capabilities, peripherals).
Admin:
  Fixes report of Pandaboard no longer booting, since it has no drive 4.

s/PMF/i2cutils

@@ -1813,11 +1813,7 @@ DefaultCMOSTable
         DCB     FileLangCMOS,       fsnumber_adfs   ; ADFS
       ]
     ]
-    [ "$Machine"="CortexA9"
-        DCB     FontCMOS,           255     ; Changed to 1016k from 256K for modern machines
-    |
         DCB     FontCMOS,           64      ; KJB 13-Dec-02: Changed to 256K from 64K
-    ]
         DCB     PigCMOS,            10
         DCB     KeyRepCMOS,         8
         DCB     RMASizeCMOS,        0
@@ -1895,12 +1891,8 @@ DefaultCMOSTable
         ;       FontMaxCMOS                     yes, omitting is deliberate!
         DCB     FontMax2CMOS,       &2C       ; 32 point
         DCB     FontMax3CMOS,       &38       ; 32 point
-      |
-      [ "$Machine"="CortexA9"
-        DCB     FontMaxCMOS,        255       ; 16380k
       |
         DCB     FontMaxCMOS,        64        ; 4096k
-      ]
         DCB     FontMax2CMOS,       36:EOR:12 ; 36 point
         DCB     FontMax3CMOS,       36:EOR:24 ; 36 point
         DCB     FontMax4CMOS,       16        ; 16 point
@@ -1915,9 +1907,6 @@ DefaultCMOSTable
       |
         DCB     CDROMFSCMOS,        &C1                  ; drives = 1, buffer size = 256K
       ]
-      [ "$Machine"="CortexA9"
-        DCB     SCSIFSDrivesCMOS,   &20                  ; default to SCSIFS Drive 4
-      ]
  ]
         DCB     &FF
         ALIGN