i2c: s3c2410: simplify getting of_device_id match data

Use of_device_get_match_data() to make the code slightly smaller.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sylwester Nawrocki <snawrocki@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>