Fix build for mx7dsabresd (secure config)

After moving CONFIG_USB_EHCI_MX7 to Kconfig,
the flag must be set in defconfig for mx7dsabresd.
It is already for the not secure config, it is
missing in the secure configuration.
Signed-off-by: NStefano Babic <sbabic@denx.de>
CC: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: NFabio Estevam <fabio.estevam@nxp.com>

configs/mx7dsabresd_secure_defconfig

@@ -4,6 +4,7 @@ CONFIG_TARGET_MX7DSABRESD=y
 CONFIG_IMX_RDC=y
 CONFIG_IMX_BOOTAUX=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx7dsabresd/imximage.cfg"
+CONFIG_BOOTDELAY=3
 CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_BOOTD is not set
 CONFIG_CMD_BOOTZ=y
@@ -28,6 +29,8 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_MXC_USB_OTG_HACTIVE=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y