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/B4420QDS_defconfig b/configs/B4420QDS_defconfig
index 3cf1935..7d472ce 100644
--- a/configs/B4420QDS_defconfig
+++ b/configs/B4420QDS_defconfig
@@ -19,6 +19,7 @@
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_DATE=y
+CONFIG_MP=y
 CONFIG_CMD_EXT2=y
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_FSL_CAAM=y