RTC for 6.3

Subsystem:
 - allow rtc_read_alarm without read_alarm callback

New driver:
 - NXP BBNSM module RTC

Drivers:
 - use IRQ flags from fwnode when available
 - abx80x: nvmem support
 - brcmstb-waketimer: add non-wake alarm support
 - ingenic: provide CLK32K clock
 - isl12022: cleanups
 - moxart: switch to using gpiod API
 - pcf85363: allow setting quartz load
 - pm8xxx: cleanups and support for setting time
 - rv3028, rv3032: add ACPI support
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