Migrate the few ARM Layerscape platforms that had not been switched
along with all remaining PowerPC platforms to DM_SERIAL. For PowerPC,
this means that platforms which use SPL/TPL, keeping the non-DM serial
driver enabled there as they do not use DM. We also rework the guards
on how to define CFG_SYS_NS16550_CLK so that this is mostly in one place
now.

Signed-off-by: Tom Rini <trini@konsulko.com>

Perform a simple rename of CONFIG_EXTRA_ENV_SETTINGS to CFG_EXTRA_ENV_SETTINGS

Signed-off-by: Tom Rini <trini@konsulko.com>

The way all of the memory init code here works is that we pass
0xDEADBEEF around for the initial value (as it's a well known 'poison'
value and so easily recognized in debuggers, etc). The only point of
this CONFIG symbol was to pass in a different value for that purpose.
Drop this symbol and cleanup the code slightly.

Signed-off-by: Tom Rini <trini@konsulko.com>

This converts the following to Kconfig:
   CONFIG_L2_CACHE

Signed-off-by: Tom Rini <trini@konsulko.com>

This converts the following to Kconfig:
   CONFIG_GATEWAYIP
   CONFIG_HOSTNAME
   CONFIG_IPADDR
   CONFIG_NETMASK
   CONFIG_ROOTPATH
   CONFIG_SERVERIP
   CONFIG_UBOOTPATH

To do this, we introduce a CONFIG_USE_ form of each of the above and
change include/env_default.h to test for that to be set before setting a
value. Further, we don't want to stringify the IP address related values
as they are now properly strings via Kconfig.

Signed-off-by: Tom Rini <trini@konsulko.com>

As DM_ETH is required for all network drivers, it's now safe to remove
the non-DM_ETH support code.  Doing this removes some board support code
which was also unused. Finally, this removes some CONFIG symbols that
otherwise needed to be migrated to Kconfig, but were unused in code now.

Signed-off-by: Tom Rini <trini@konsulko.com>

This converts the following to Kconfig:
   CONFIG_SPD_EEPROM

Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>

Only this platform sets this option, define it in the board Kconfig
file.

Signed-off-by: Tom Rini <trini@konsulko.com>

This converts the following to Kconfig:
   CONFIG_HWCONFIG

Signed-off-by: Tom Rini <trini@konsulko.com>

This converts the following to Kconfig:
   CONFIG_FSL_CADMUS

Signed-off-by: Tom Rini <trini@konsulko.com>