Signed-off-by: Samuel <samuel@bingbong.tech>

Signed-off-by: Samuel <samuel@bingbong.tech>

Signed-off-by: Samuel <samuel@bingbong.tech>

Signed-off-by: Samuel <samuel@bingbong.tech>

use rust 1.32.0 `to_be_bytes` instead

The activated mode allows one to call functions without passing the SPI reference
each time, while not consuming it for the lifetime of W5500.

Replace function signature 'fn ..<E, S: FullDuplex<u8, Error=E>>(&mut self, spi: &mut S,...)' with 'fn ..<E>(&mut self, spi: &mut FullDuplex<u8, Error=E>,..)' add SocketRegister, ability to conf./get/set socket interrupts