treewide: mem: Move mtest related defines to Kconfig

Move below defines which are used by mtest utility to Kconfig.
CONFIG_SYS_MEMTEST_START
CONFIG_SYS_MEMTEST_END

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
[trini: Fix kmcoge5ne board, re-run migration as well]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/sansa_fuze_plus_defconfig b/configs/sansa_fuze_plus_defconfig
index b207592..188b0ee 100644
--- a/configs/sansa_fuze_plus_defconfig
+++ b/configs/sansa_fuze_plus_defconfig
@@ -22,6 +22,8 @@
 # CONFIG_SPL_FRAMEWORK is not set
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_MEMTEST=y
+CONFIG_SYS_MEMTEST_START=0x40000000
+CONFIG_SYS_MEMTEST_END=0x40400000
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y