msm-core: debug: Update the number of supported pstates

Update the number of power-freq pair value supported in the debug
interface. Parse the arguments as uint32_t instead of uint64_t which
might cause memory corruption.

CRs-fixed: 1054344
Change-Id: I30492b79b96356177cdcc72e4e2ee656317de500
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>