ARM: smp_twd: use clockevents_update_freq to update frequency

ARM: smp_twd: use clockevents_update_freq to update frequency

clockevents_reconfigure was an older api that doesn't handle
updating the max time between ticks when the frequency changes.
Under some conditions, the boot value of max_delta_ns scaled
by the mult/shift values for the current frequency can result
in a value of 0x200000004 selected as the number of cycles to
program for a long tick, which gets wrapped to 0x4.

Also switch to the matching clockevents_config_and_register
function to register the clockevent, which handles converting
the min/max ticks to ns during init.

Change-Id: I6ca659c309e7bb031cdb1954767b5aa7a022ff44
Signed-off-by: Colin Cross <ccross@android.com>