msm: mpm_ctr: Update correct name usage and frequency property

MPM counter is a generic name, use the specific counter name
and update the property list by adding support for
frequency property. Also update 8974 device tree files to
reflect the above.

Change-Id: Ibd5c3913bd3d9819552e05b8300f7efb8491f7f1
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
Signed-off-by: Joel King <joelking@codeaurora.org>
3 files changed