ARM: dts: msm: Configure the LDO10 as a parent to LDO15 for trinket

Configure the LDO10 as a parent-supply to the LDO15 as per
the client's requirement.

Change-Id: Ibacaff43c3fbacb027181dfe0ac00063b885bca9
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>