soc: qcom: spss_utils: IAR 3rd party uefi app

Set saved cmac on ioctl from user space.
Write saved cmac to shared memory on SSR.
Read calculated cmac from shared memory.
Provide calculated cmac to user space via sysfs.
Cleanup unused IAR-STATE fuses.
Cleanup unused IAR-FEATURE-ENABLED fuse.
Read actual PIL area size from register.
pbl_cmac_show() returns binary rather than string.
Change IOCTL to use variable-size-array.

Change-Id: Ic4ea38685f6b9d1100a28bd958e44f513373fea9
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>