Add rtc driver and bindigns for the amlogic A113L2 and A113X2 SoCs

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
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Changes in v2:
- Modify bindings clock name and perfect the example.
- Fix some bug in driver, and use dev_err_probe instead of dev_err in probe process.
- Use RTC API to handle calibration.
- Remove unused func and rename driver file name.
- Link to v1: https://lore.kernel.org/r/20240823-rtc-v1-0-6f70381da283@amlogic.com

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Yiting Deng (3):
      dt-bindings: rtc: Add Amlogic A4 and A5 rtc
      rtc: support for the Amlogic on-chip RTC
      MAINTAINERS: Add an entry for Amlogic RTC driver

 .../bindings/rtc/amlogic,amlogic-rtc.yaml          |  66 +++
 MAINTAINERS                                        |   8 +
 drivers/rtc/Kconfig                                |  12 +
 drivers/rtc/Makefile                               |   1 +
 drivers/rtc/rtc-amlogic-a4.c                       | 481 +++++++++++++++++++++
 5 files changed, 568 insertions(+)
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base-commit: 3047c9a740816d5a930c8c741c3932a3544267f2
change-id: 20240823-rtc-127cd8192a13

Best regards,
-- 
Xianwei Zhao <xianwei.zhao@amlogic.com>