freescale/layerscape: Rename the config CONFIG_SECURE_BOOT name

Rename CONFIG_SECURE_BOOT to CONFIG_NXP_ESBC to avoid conflict
with UEFI secure boot.

Signed-off-by: Udit Agarwal <udit.agarwal@nxp.com>
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/ls1088ardb_tfa_SECURE_BOOT_defconfig b/configs/ls1088ardb_tfa_SECURE_BOOT_defconfig
index 45df134..203c795 100644
--- a/configs/ls1088ardb_tfa_SECURE_BOOT_defconfig
+++ b/configs/ls1088ardb_tfa_SECURE_BOOT_defconfig
@@ -3,7 +3,7 @@
 CONFIG_TFABOOT=y
 CONFIG_SYS_TEXT_BASE=0x82000000
 CONFIG_SYS_MALLOC_F_LEN=0x6000
-CONFIG_SECURE_BOOT=y
+CONFIG_NXP_ESBC=y
 CONFIG_QSPI_AHB_INIT=y
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT=y