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/stm32mp15_dhcom_basic_defconfig b/configs/stm32mp15_dhcom_basic_defconfig
index 661c054..c2f3a5e 100644
--- a/configs/stm32mp15_dhcom_basic_defconfig
+++ b/configs/stm32mp15_dhcom_basic_defconfig
@@ -24,6 +24,8 @@
 CONFIG_CMD_EEPROM=y
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_MEMTEST=y
+CONFIG_SYS_MEMTEST_START=0xc0000000
+CONFIG_SYS_MEMTEST_END=0xc4000000
 CONFIG_CMD_ADC=y
 CONFIG_CMD_CLK=y
 CONFIG_CMD_DFU=y