samples: peripheral_uart: Fix hard-coded timeout value

[pideu-mh]

Calls to uart_rx_enable() require a timeout argument, for which UART_WAIT_FOR_RX is used in 2 of 3 calls in this application.

The initial init call, however, uses a hardcoded value of 50 (milliseconds) instead of UART_WAIT_FOR_RX which is clearly an oversight.

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[KAGA164]

Thanks for your contribution @pideu-mh. I check the reason why CI failed:

6: UC4 Commit message body line exceeds max length (75>72): "The initial init call, however, uses a hardcoded value of 50 (milliseconds)"
Error: Process completed with exit code 1.

Could you format your commit message according to above requirement?

[pideu-mh]

Could you format your commit message according to above requirement?

I'm sorry for the additional work on your side. I have now reformatted the commit message and force pushed an update.

[NordicBuilder]

Test specification

CI/Jenkins/NRF

• Integration Platforms

CI/Jenkins/integration

Test Module	File based changes	Manually selected	West overwrite
test-fw-nrfconnect-ble	X
test-fw-nrfconnect-ble_samples	X

Detailed information of selected test modules

Note: This message is automatically posted and updated by the CI

[KAGA164]

One more thing. The PR target is wrong. This should go to ncs main branch. @pideu-mh Could you change PR target?

[carlescufi]

@pideu-mh can you please retarget this PR against the main branch and then we'll take care of backporting to v2.4?

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