arch: arm: Adding fault description for the cortex A7

Add support for processing the Fault Status Registers and recoverable
data abort for the cortex A7.

Based on Cortex-A7 MPCore Technical Reference Manual (ARM DDI 0406).
(see https://developer.arm.com/documentation/ddi0406

)

Signed-off-by: Julien Racki <julien.racki@st.com>