Add identifiers of the Cortex-A76 ROM and debug unit. Change-Id: Ieef0d990189d3c0502e8d530874dc9cbca4417d8 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-on: http://openocd.zylin.com/6358 Tested-by: jenkins Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>