iio: chemical: sgp30: Convert enum->pointer for data in the match tables

Convert enum->pointer for data in the match tables, so that
device_get_match_data() can do match against OF/ACPI/I2C tables, once i2c
bus type match support added to it.

Add product_id variable to struct sgp_device and remove the local variable
product_id in probe() and replace enum->struct *sgp_device for data in the
match table. Simplify theprobe() by replacing device_get_match_data() and
ID lookup for retrieving data by i2c_get_match_data().

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230812165730.216180-1-biju.das.jz@bp.renesas.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>