ARM64: dts: darcy: copy power tree data for darcy

ARM64: dts: darcy: copy power tree data for darcy

Copy foster power tree dts file content to darcy
as darcy will be subset of Foster,using seperate
power tree dts file for darcy to avoid any
issues when changes made for Foster platform
only.

Bug 1700499

Change-Id: I8077319b88f64003febdb171892c36b9b20640ff
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Reviewed-on: http://git-master/r/834458
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>