iio: magnetometer: st_magn_spi: fix spi_device_id table

Remove LSM303DLHC, LSM303DLM from st_magn_id_table since LSM303DL series
does not support spi interface

Fixes: 872e79ad (iio: magn: Add STMicroelectronics magn driver)
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>