msm: sde: Allocate memory for SIDs passed in scm_call

Allocate memory through kzalloc and pass the physical
address to scm_call instead of using the local stack
variable to make the implementation consistent with
the SDE driver.

Change-Id: Iee67c72758c2eab8c58014301ee6526ac339361b
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>