rtc: s5m: drop unneeded MODULE_ALIAS

The MODULE_DEVICE_TABLE already creates proper alias for platform
driver.  Having another MODULE_ALIAS causes the alias to be duplicated.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210916164604.134924-1-krzysztof.kozlowski@canonical.com

drivers/rtc/rtc-s5m.c

@@ -861,4 +861,3 @@ module_platform_driver(s5m_rtc_driver);
 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 MODULE_DESCRIPTION("Samsung S5M/S2MPS14 RTC driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:s5m-rtc");