The Puzzle devices come with an I2C-connected Epson RX8130 RTC.
Disable the (dysfunctional) RTC units of the SoC and add driver
kmod-rtc-ds1307 to support the Epson RX8130 instead.
Tested-by: Thomas Huehn <thomas.huehn@hs-nordhausen.de>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>