cmd: Kconfig: Move CONFIG_MP to Kconfig

This patch moves CONFIG_MP to Kconfig

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xpedite537x_defconfig b/configs/xpedite537x_defconfig
index 26a4006..29e4fad 100644
--- a/configs/xpedite537x_defconfig
+++ b/configs/xpedite537x_defconfig
@@ -22,6 +22,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_DATE=y
+CONFIG_MP=y
 # CONFIG_CMD_HASH is not set
 CONFIG_CMD_JFFS2=y
 # CONFIG_CMD_IRQ is not set