misc: lis3lv02d: Fix reading 'st,default-rate' property

The property 'st,default-rate' is tested for presence, but the value is
ignored and the 'default_rate' value is updated with a stale 'val'
value. Fix this by using of_property_read_u32().

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230310144713.1543613-1-robh@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>