km/ppc: use Kconfig for MEMTEST configuration

Also change back SYS_MEMTEST_END to 0x00f00000. 0xe00000 was wrong and
introduced due to the global Kconfig migration of this option in u-boot.

CC: Heiko Schocher <hs@denx.de>
CC: Tom Rini <trini@konsulko.com>
Signed-off-by: Holger Brunck <holger.brunck@hitachi-powergrids.com>
3 files changed