arm64: remove redundant "psci:" prefixes

Since 652af899799354049b273af897b798b8f03fdd88 "arm64: factor out spin-table
boot method" psci prefix's been introduced. We have a common pr_fmt, so clean
them up.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Git-commit: 288ac26cc2334e5e6ecad6416e9bf750691afd84
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>