ARM: OMAP4: remove old clock data and link in new clock init code

OMAP4 clocks have now been moved to DT, thus remove the old data file
and use the new init code under drivers/clk/omap/clk-44xx.c.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>