refactor(cpus): convert Neoverse Poseidon to use CPU helpers

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: Icf406c05cdb8d62cd0f41a5f19ae5376707e69bd
(cherry picked from commit b98eb2dc1d49f5c279e236051d861a1deb7d0ef9)
1 file changed