haven: hh_rm_iface: Avoid integer overflow for multiplication

Add a check to ensure that overflow does not happen in multiplication
operation.

Change-Id: I28ea55c760257775c1bec3fdfb373fe075190cab
Signed-off-by: Naman Jain <quic_namajain@quicinc.com>
Signed-off-by: Kishor Krishna Bhat <quic_kishkris@quicinc.com>