soc: qcom: spss_utils: fix SPU SSR during IAR-sw-update

Fix buffer overflow on memcpy().
memcpy size of u32 on bool variable.
memcpy() to "is_ssr_disabled" overwrites "is_iar_active" to zero.

Change-Id: If7b9ca9149feb54a37fbb0eef7300fa8021d4e54
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>