MLK-14418-2 configs: mx7dsdb: rename board config file

Let kernel default runs in secure mode.
Signed-off-by: Peng Fan <peng.fan@nxp.com>

configs/mx7dsabresd_defconfig

 CONFIG_ARM=y
 CONFIG_ARCH_MX7=y
 CONFIG_TARGET_MX7DSABRESD=y
-# CONFIG_ARMV7_VIRT is not set
+CONFIG_ARMV7_BOOT_SEC_DEFAULT=y
 CONFIG_IMX_RDC=y
 CONFIG_IMX_BOOTAUX=y
 CONFIG_VIDEO=y
@@ -19,6 +19,7 @@ CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_DFU=y
@@ -34,6 +35,8 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_RAM=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_EON=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_MXC_USB_OTG_HACTIVE=y

configs/mx7dsabresd_secure_defconfig → configs/mx7dsabresd_nonsec_defconfig

 CONFIG_ARM=y
 CONFIG_ARCH_MX7=y
 CONFIG_TARGET_MX7DSABRESD=y
-CONFIG_ARMV7_BOOT_SEC_DEFAULT=y
+# CONFIG_ARMV7_VIRT is not set
 CONFIG_IMX_RDC=y
 CONFIG_IMX_BOOTAUX=y
 CONFIG_VIDEO=y
@@ -19,7 +19,6 @@ CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_MMC=y
-CONFIG_CMD_SF=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_DFU=y
@@ -35,8 +34,6 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_RAM=y
-CONFIG_SPI_FLASH=y
-CONFIG_SPI_FLASH_EON=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_MXC_USB_OTG_HACTIVE=y