ARM: remove "SMP: Total of %d processors activated." message

The "SMP: Total of %d processors activated." message which we print in
smp_cpus_done() provides no further information than the message in
genreic code in smp_announce().  Kill it.

Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>