ARM: davinci: convert to clockevents_config_and_register

clockevents_config_and_register is superior compared to setting
shift/mult and {min,max}_delta_ns by hand.

Tested-by: Prabhakar Lad <prabhakar.csengg@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[nsekhar@ti.com: fix an alignment related checkpatch warning]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>