arm: dts: Clock changes to avoid race conditions

In the Present code multiple child clocks has
sibling value of 0. In order to avoid race
conditions which might arise out of this, parent
clock is made to depend on only one of the child
clocks.

Change-Id: I746795d8cfcc5b87edc70471a148e20258776532
Signed-off-by: Vivek Veenam <vveenam@codeaurora.org>