Ambiguous glob re-exports in hal/src/serial/mod.rs

[michalfita]

Reported on CI and on my computer after rustc upgrade:

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:23:9
   |
23 | pub use uart::*;
   |         ^^^^^^^ the name `Tx` in the type namespace is first re-exported here
...
26 | pub use usart::*;
   |         -------- but the name `Tx` in the type namespace is also re-exported here
   |
   = note: `-D ambiguous-glob-reexports` implied by `-D warnings`

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:23:9
   |
23 | pub use uart::*;
   |         ^^^^^^^ the name `Rx` in the type namespace is first re-exported here
...
26 | pub use usart::*;
   |         -------- but the name `Rx` in the type namespace is also re-exported here

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:23:9
   |
23 | pub use uart::*;
   |         ^^^^^^^ the name `Uart` in the type namespace is first re-exported here
...
26 | pub use usart::*;
   |         -------- but the name `Uart` in the type namespace is also re-exported here

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:23:9
   |
23 | pub use uart::*;
   |         ^^^^^^^ the name `UartError` in the type namespace is first re-exported here
...
26 | pub use usart::*;
   |         -------- but the name `UartError` in the type namespace is also re-exported here

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:23:9
   |
23 | pub use uart::*;
   |         ^^^^^^^ the name `Event` in the type namespace is first re-exported here
...
34 | pub use spi::*;
   |         ------ but the name `Event` in the type namespace is also re-exported here

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:26:9
   |
26 | pub use usart::*;
   |         ^^^^^^^^ the name `Client` in the type namespace is first re-exported here
...
34 | pub use spi::*;
   |         ------ but the name `Client` in the type namespace is also re-exported here

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:26:9
   |
26 | pub use usart::*;
   |         ^^^^^^^^ the name `Spi` in the type namespace is first re-exported here
...
34 | pub use spi::*;
   |         ------ but the name `Spi` in the type namespace is also re-exported here

error: ambiguous glob re-exports
  --> hal/src/serial/mod.rs:26:9
   |
26 | pub use usart::*;
   |         ^^^^^^^^ the name `SpiError` in the type namespace is first re-exported here
...
34 | pub use spi::*;
   |         ------ but the name `SpiError` in the type namespace is also re-exported here

error: could not compile `atsamx7x-hal` (lib) due to 8 previous errors
Error: Process completed with exit code 101.

[martinmortsell]

Note that these are warnings raised to errors due to the -D warnings flag set in the CI.