ARM: dts: msm: add support for msmcobalt v2 CPU clock frequency plan

Define the Silver and Gold cluster OSM look up tables
with the frequencies and data required to support Silver
cluster scaling up to 1.9 GHz and Gold cluster to
2.5 GHz. Also, update the supported frequencies in the msm
and devfreq CPUfreq devices.

CRs-Fixed: 1051857
Change-Id: Id9e9d37c6c0ac5c3ba6f566377bf86dbfe8ccabb
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>