radio: iris: Bound check user space values

There is no bound check for arguments passed
from user space to kernel space. This may cause
fatal exceptions.

Change-Id: I944e8e5d6e3b12b75df4e6cee7887075237b4411
CRs-Fixed: 546081
Signed-off-by: Ayaz Ahmad <aahmad@codeaurora.org>