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/ls1088ardb_qspi_SECURE_BOOT_defconfig b/configs/ls1088ardb_qspi_SECURE_BOOT_defconfig
index db95289..3212704 100644
--- a/configs/ls1088ardb_qspi_SECURE_BOOT_defconfig
+++ b/configs/ls1088ardb_qspi_SECURE_BOOT_defconfig
@@ -23,6 +23,7 @@
 CONFIG_CMD_SF=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_MP=y
 CONFIG_OF_CONTROL=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y