Repairs mode abscal that failed to send PTP_SYNC after each PPS on CLB.

rt_cpu: disable PLL verbose mode by default (output on UART is blocking and greatly slows down LDPC port calibration in the WR Switch)

In order to have a more similar wrpc-sw using wrnic_defconfig or using
spec_defconfig

In case we are using the WR_NIC_CPU option we redirect ARP & ICMP to
external fabric (controlled by NIC driver on host CPU).
We have also add this option to Kconfig and update the wrnic_defconfig
used by wr-starting-kit