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/db-xc3-24g4xg_defconfig b/configs/db-xc3-24g4xg_defconfig
index 0d49d40..2bbff64 100644
--- a/configs/db-xc3-24g4xg_defconfig
+++ b/configs/db-xc3-24g4xg_defconfig
@@ -15,6 +15,8 @@
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_SYS_ALT_MEMTEST=y
+CONFIG_SYS_MEMTEST_START=0x00800000
+CONFIG_SYS_MEMTEST_END=0x00ffffff
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_I2C=y
 CONFIG_CMD_SPI=y