mx7dsabresd: Remove the mx7dsabresd_secure_defconfig target

mx7dsabresd_secure_defconfig was introduced to allow booting NXP kernel
that has CAAM support and needs to boot in secure mode.

Instead of keeping two different config targets for the same board,
remove mx7dsabresd_secure_defconfig and select
CONFIG_ARMV7_BOOT_SEC_DEFAULT inside mx7dsabresd_defconfig so that
this target could be used to boot both mainline and the vendor kernel.

This makes maintenance task easier and avoid potentially confusion
for the end user.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

board/freescale/mx7dsabresd/MAINTAINERS

@@ -4,4 +4,3 @@ S:	Maintained
 F:	board/freescale/mx7dsabresd
 F:	include/configs/mx7dsabresd.h
 F:	configs/mx7dsabresd_defconfig
-F:	configs/mx7dsabresd_secure_defconfig

configs/mx7dsabresd_defconfig

@@ -2,6 +2,7 @@ CONFIG_ARM=y
 CONFIG_ARCH_MX7=y
 CONFIG_SYS_TEXT_BASE=0x87800000
 CONFIG_TARGET_MX7DSABRESD=y
+CONFIG_ARMV7_BOOT_SEC_DEFAULT=y
 # CONFIG_ARMV7_VIRT is not set
 CONFIG_IMX_RDC=y
 CONFIG_IMX_BOOTAUX=y

configs/mx7dsabresd_secure_defconfig

@@ -1,78 +0,0 @@
-CONFIG_ARM=y
-CONFIG_ARCH_MX7=y
-CONFIG_SYS_TEXT_BASE=0x87800000
-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_CMD_BMODE is not set
-CONFIG_DEFAULT_DEVICE_TREE="imx7d-sdb"
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx7dsabresd/imximage.cfg"
-# CONFIG_CONSOLE_MUX is not set
-CONFIG_SYS_CONSOLE_IS_IN_ENV=y
-CONFIG_HUSH_PARSER=y
-# CONFIG_CMD_BOOTD is not set
-CONFIG_CMD_BOOTZ=y
-# CONFIG_CMD_IMI is not set
-# CONFIG_CMD_XIMG is not set
-# CONFIG_CMD_EXPORTENV is not set
-# CONFIG_CMD_IMPORTENV is not set
-CONFIG_CMD_MEMTEST=y
-CONFIG_CMD_DFU=y
-CONFIG_CMD_GPIO=y
-CONFIG_CMD_I2C=y
-CONFIG_CMD_MMC=y
-CONFIG_CMD_SF=y
-CONFIG_CMD_USB=y
-CONFIG_CMD_USB_MASS_STORAGE=y
-CONFIG_CMD_DHCP=y
-CONFIG_CMD_MII=y
-CONFIG_CMD_PING=y
-CONFIG_CMD_BMP=y
-CONFIG_CMD_CACHE=y
-CONFIG_CMD_PMIC=y
-CONFIG_CMD_REGULATOR=y
-CONFIG_CMD_EXT2=y
-CONFIG_CMD_EXT4=y
-CONFIG_CMD_EXT4_WRITE=y
-CONFIG_CMD_FAT=y
-CONFIG_OF_CONTROL=y
-CONFIG_DFU_MMC=y
-CONFIG_DFU_RAM=y
-CONFIG_DM_GPIO=y
-CONFIG_DM_74X164=y
-CONFIG_DM_I2C=y
-CONFIG_DM_MMC=y
-CONFIG_MMC_IO_VOLTAGE=y
-CONFIG_MMC_UHS_SUPPORT=y
-CONFIG_MMC_HS200_SUPPORT=y
-CONFIG_FSL_ESDHC=y
-CONFIG_SPI_FLASH=y
-CONFIG_SPI_FLASH_EON=y
-CONFIG_PHYLIB=y
-CONFIG_PINCTRL=y
-CONFIG_PINCTRL_IMX7=y
-CONFIG_DM_PMIC=y
-CONFIG_DM_PMIC_PFUZE100=y
-CONFIG_DM_REGULATOR=y
-CONFIG_DM_REGULATOR_PFUZE100=y
-CONFIG_DM_REGULATOR_FIXED=y
-CONFIG_DM_REGULATOR_GPIO=y
-CONFIG_DM_SPI=y
-CONFIG_SOFT_SPI=y
-CONFIG_USB=y
-CONFIG_DM_USB=y
-CONFIG_USB_EHCI_HCD=y
-CONFIG_MXC_USB_OTG_HACTIVE=y
-CONFIG_USB_STORAGE=y
-CONFIG_USB_GADGET=y
-CONFIG_USB_GADGET_MANUFACTURER="FSL"
-CONFIG_USB_GADGET_VENDOR_NUM=0x0525
-CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
-CONFIG_CI_UDC=y
-CONFIG_USB_GADGET_DOWNLOAD=y
-CONFIG_USB_HOST_ETHER=y
-CONFIG_USB_ETHER_ASIX=y
-CONFIG_VIDEO=y
-CONFIG_ERRNO_STR=y