qseecom: Report address of secure app region to QSEE

QSEE verion 2 supports relocatable images. To support this
a chunk of contiguous memory in the first 256MB  bank is
reserved for loading the secure applications.  The location
and size of this memory region is defined in the device tree
data of the driver.

This patch
- Adds supports for retrieving the address and size of the
  memory region reserved for the secure app from the device
  tree data
- Adds a new command to issue to QSEE for notifying this
  app region information (retrieved from device tree)

Change-Id: I0310815bf42c3705e0f15bd69bd4b02c6f4c56b0
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>