rtc: m48t59: Remove division condition with direct comparison

Replace 'year / 100' with a direct comparison 'year >= 100'
in m48t59_rtc_set_time() function. Improve the code clarity
and eliminate division overhead.

Fix the following smatch warning:
drivers/rtc/rtc-m48t59.c:135 m48t59_rtc_set_time() warn:
replace divide condition 'year / 100' with 'year >= 100'

Signed-off-by: Abhishek Tamboli <abhishektamboli9@gmail.com>
Link: https://lore.kernel.org/r/20240809155631.548044-1-abhishektamboli9@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: Abhishek-Tamboli9

drivers/rtc/rtc-m48t59.c

@@ -132,7 +132,7 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	M48T59_WRITE((bin2bcd(tm->tm_mon + 1) & 0x1F), M48T59_MONTH);
 	M48T59_WRITE(bin2bcd(year % 100), M48T59_YEAR);
 
-	if (pdata->type == M48T59RTC_TYPE_M48T59 && (year / 100))
+	if (pdata->type == M48T59RTC_TYPE_M48T59 && (year >= 100))
 		val = (M48T59_WDAY_CEB | M48T59_WDAY_CB);
 	val |= (bin2bcd(tm->tm_wday) & 0x07);
 	M48T59_WRITE(val, M48T59_WDAY);