refactor(cpus): use cpu errata wrappers Cortex-A7 and A9 aarch32 cpus

Adapt to use errata frame-work cpu macro helpers for following cpu's:

- Cortex-A7
- Cortex-A9

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

Change-Id: I88eb90d7fd0e82fc4bfc9d1aee947f0c820e1222
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
2 files changed