Remove warning message when checking codeing style with checkpatch script
and reduce un-necessary i2c read operation on s3c_rtc_enable.

    WARNING: line over 80 characters
    #406: FILE: drivers/rtc/rtc-s3c.c:406:
    +		if ((readw(info->base + S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {

    WARNING: line over 80 characters
    #414: FILE: drivers/rtc/rtc-s3c.c:414:
    +		if ((readw(info->base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {

    WARNING: line over 80 characters
    #422: FILE: drivers/rtc/rtc-s3c.c:422:
    +		if ((readw(info->base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {

    WARNING: Missing a blank line after declarations
    #451: FILE: drivers/rtc/rtc-s3c.c:451:
    +	struct s3c_rtc_drv_data *data;
    +	if (pdev->dev.of_node) {

    WARNING: Missing a blank line after declarations
    #453: FILE: drivers/rtc/rtc-s3c.c:453:
    +		const struct of_device_id *match;
    +		match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);

    WARNING: DT compatible string "samsung,s3c2416-rtc" appears un-documented -- check ./Documentation/devicetree/bindings/
    #650: FILE: drivers/rtc/rtc-s3c.c:650:
    +		.compatible = "samsung,s3c2416-rtc",

    WARNING: DT compatible string "samsung,s3c2443-rtc" appears un-documented -- check ./Documentation/devicetree/bindings/
    #653: FILE: drivers/rtc/rtc-s3c.c:653:
    +		.compatible = "samsung,s3c2443-rtc",

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>