powerpc/44x: Fix L2-cache support for 460GT

Also set L2C_CFG_RDBW on 460GT platforms and not only on 460EX.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
1 file changed