rtc: bd70528: fix module alias to autoload module

The module alias platform tag contains a spelling mistake. Fix it.

Fixes: f33506abbcdd ("rtc: bd70528: Add MODULE ALIAS to autoload module")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20191106083418.159045-1-colin.king@canonical.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-bd70528.c

@@ -491,4 +491,4 @@ module_platform_driver(bd70528_rtc);
 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
 MODULE_DESCRIPTION("BD70528 RTC driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platofrm:bd70528-rtc");
+MODULE_ALIAS("platform:bd70528-rtc");