net: ti: prueth_core: hsr/prp: add NSP support

For HSR/PRP the timer has to be run at 10 msec due to requirement
to support offload function in firmware. So run the basic timer
at 10 msec when Ethernet type is HSR/PRP and use a counter to count
100 msec for NSP timer. Keep the basic timer at 100 msec when in
Dual EMAC mode to reduce CPU cycle usage.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>