arm64: defconfig: Enable rv3028 i2c rtc driver

Enable rv3028 i2c rtc driver as module. It is populated on
phyBOARD-Pollux-i.MX8M Plus.
Signed-off-by: NTeresa Remmet <t.remmet@phytec.de>
Reviewed-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm64/configs/defconfig

@@ -855,6 +855,7 @@ CONFIG_RTC_DRV_RK808=m
 CONFIG_RTC_DRV_PCF85363=m
 CONFIG_RTC_DRV_M41T80=m
 CONFIG_RTC_DRV_RX8581=m
+CONFIG_RTC_DRV_RV3028=m
 CONFIG_RTC_DRV_RV8803=m
 CONFIG_RTC_DRV_S5M=y
 CONFIG_RTC_DRV_DS3232=y