soc: espressif: load RTC region into loader process

Only RTC DRAM area is currently being loaded during segment loader.
It means that RTC_IRAM and RTC_DATA is missing, causing
issues when sleep-modes are needed.

This also re-format the segments logging output
to meet with MCUBoot/Simple boot cases.

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>