ARM: dts: omap54xx-clocks: remove the autoidle properties for clock nodes

In OMAP5 bit 8 in PRCM registers are not defined (Reserved) unlike their
counterpart in OMAP4.
It is better to not write to these bits.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>