arch: arm: cortex_a_r: use correct name for TLB Conflict Abort

Commit 87719828 introduced FSR definitions
for ARMv7-A/R; however, the value 16 which is documented in the ARM[1] as
a "TLB Conflict Abort", was introduced as "TLB Conflict Fault" instead and
described as a "Table Conflict Fault".

Update all affected files to use the ARM's naming for this error instead.

[1] Architecture Reference Manual (Document ID: ARM DDI 0406C.d)
    "ARM Architecture Reference Manual for ARMv7-A and ARMv7-R Edition"

Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>