refactor(cpus): use cpu errata wrappers Cortex-A12 aarch32 cpu

Adapt to use errata frame-work cpu macro helpers for Cortex-A12
aarch32 cpu.

Testing:
- Manual comparison of disassembly with and without the patch.
- Compile testing.

Change-Id: I9bad7f1e3d87419c0451b5d46edf0c406d31a84d
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
1 file changed