Commit b5fe2429 ("arm64: kernel: fix style issues in sleep.S")
changed the linkage of _cpu_resume() to local, even though the symbol
is also referenced from hibernate.c. So revert this change.
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>