Report error info when load BL30 failed
Report error info when load BL30 failed

This is a temporary fix, when load BL30 image failed it will just report
the error rather than run into panic. Will fix this issue when we move
mcu image from fip into its dedicated partition.

Signed-off-by: Leo Yan <a38ad1fbd0b3373e0c012f4d28e16dbce652d487@linaro.org>

96boards/arm-trusted-firmware,jforissier/arm-trusted-firmware,96boards/arm-trusted-firmware,vchong/arm-trusted-firmware,jforissier/arm-trusted-firmware,vchong/arm-trusted-firmware