ARM: dts: Update energy costs for sdmmagpie

Update energy costs with new available frequenices for sdmmagpie,
which are used for task placement decisions in energy aware scheduler.

Change-Id: I0505c10b25fe075a609b4cd3640bdd2efca525f4
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>