ARM: dts: mmp2-brownstone: Don't redeclare phandle references

Extend the nodes by their phandle references instead of recreating the
tree and declaring references of the same names.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200320174107.29406-5-lkundrak@v3.sk


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>