clk: qcom: Add qpnp clock divider support

Clkdiv module provides a clock output on the PMIC with CXO as
the source. This clock can be routed through PMIC GPIOs. Add
a device driver to configure this clkdiv module.

CRs-Fixed: 1085200
Change-Id: I5e91a954bf5b6adbba8547b04361daf9788cca37
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>