dts: bindings: clocks: Add smartbond low power oscillator

RC32K/RCX/XTAL32K were present in device tree as fixed-clock.
Now calibration time for RCX and RC32K is added and settle time
for XTAL32K so additional binding is created.

Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
2 files changed