drivers: soc: qcom: add initial support of rimps memlat interface

Add initial support of rimps memlat interface driver, this driver
expose sysfs nodes required to configure memlat governor running
in rimps, it also supports the rimps dump utility required for
debugging.

Change-Id: Ibb691b601cf5c05b50dc31488a1653cc239fb0f1
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>