intel/defines: Explicitly cast to uint32_t in SET_FIELD and SET_BITS

intel/defines: Explicitly cast to uint32_t in SET_FIELD and SET_BITS

If you pass a bool in as the value to set, the C standard says that it
gets converted to an int prior to shifting.  If you try to set a bool to
bit 31, this lands you in undefined behavior.  It's better just to add
the explicit cast and let the compiler delete it for us.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>