target/arm: Make cpu_register() available for other files

target/arm: Make cpu_register() available for other files

Make cpu_register() (renamed to arm_cpu_register()) available
from internals.h so we can register CPUs also from other files
in the future.

Signed-off-by: Thomas Huth <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Reviewed-by: Eric Auger <[email protected]>
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Message-id: 20200423073358[email protected]
Message-ID: <20190921150420[email protected]>
[PMD: Only take cpu_register() from Thomas's patch]
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>