OMAP3 cpuidle: remove useless SDP specific timings

The cpuidle states settings can be overriden by some board-
specific settings, by calling omap3_pm_init_cpuidle.
Remove the 3430SDP specific states settings registration
since the figures are identical to the default ones (in cpuidle34xx.c).

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>