rtc: pm8xxx: drop unused module alias

The driver only support OF probe so drop the unused platform module
alias.

Fixes: 5a41855 ("rtc: pm8xxx: add support for devicetree")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250423130318.31244-6-johan+linaro@kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: jhovold

drivers/rtc/rtc-pm8xxx.c

@@ -683,7 +683,6 @@ static struct platform_driver pm8xxx_rtc_driver = {
 
 module_platform_driver(pm8xxx_rtc_driver);
 
-MODULE_ALIAS("platform:rtc-pm8xxx");
 MODULE_DESCRIPTION("PMIC8xxx RTC driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Anirudh Ghayal <aghayal@codeaurora.org>");