change_k0_cca() is called multiple times. Move the code for
changing to KSEG1 to a macro to avoid code duplication.
Also fix missing change to KSEG1 when changing to CONF_CM_CACHABLE_COW.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>