Coverity reports a potential integer overflow in the accel_range
computation due to the use of a left shift on an int type.
CID 520269: Unintentional integer overflow (OVERFLOW_BEFORE_WIDEN)
Even though the register value is constrained to 0–3 by the BMA456 spec,
and no real overflow occurs, an explicit cast to int64_t prevents false
positives and aligns with safe coding practices.
Fixes: #90517
Signed-off-by: Gaetan Perrot <gaetan.perrot@spacecubics.com>
9207749e83