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>
diff --git a/include/configs/kmcoge5ne.h b/include/configs/kmcoge5ne.h
index 4d01f23..cdfb280 100644
--- a/include/configs/kmcoge5ne.h
+++ b/include/configs/kmcoge5ne.h
@@ -51,7 +51,7 @@
 /* enable POST tests */
 #define CONFIG_POST (CONFIG_SYS_POST_MEMORY|CONFIG_SYS_POST_MEM_REGIONS)
 #define CONFIG_POST_EXTERNAL_WORD_FUNCS /* use own functions, not generic */
-#define CPM_POST_WORD_ADDR  0x00f00000
+#define CPM_POST_WORD_ADDR  CONFIG_SYS_MEMTEST_END
 #define CONFIG_TESTPIN_REG  gprt3	/* for kmcoge5ne */
 #define CONFIG_TESTPIN_MASK 0x20	/* for kmcoge5ne */