power: qcom: msm-core: Increase the number of frequencies in pstate table

Currently the ea static ptable is limited to 20 entries. Increase this
to 50 to accommodate more frequencies per cpu.

Change-Id: I4df1fb9e27a275d48e56f4bcb37f5bed438894ff
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>