Have a single BitOrder and ByteOrder enum for all drivers

[Dominaezzz]

There's currently

• esp-hal/esp-hal/src/spi/mod.rs

  Line 89 in 2cd75e1

  pub enum BitOrder {

• esp-hal/esp-hal/src/lcd_cam/mod.rs

  Line 112 in 2cd75e1

  pub enum BitOrder {

• esp-hal/esp-hal/src/lcd_cam/mod.rs

  Line 123 in 2cd75e1

  pub enum ByteOrder {

I'm sure there'll be more in future when new drivers come in or existing drivers expose more configuration options.

Something to consider before 1.0