This patch replaces 'of_flat_dt_is_compatible' with 'of_machine_is_compatible'.
The TL-WDR4900 platform file won't compile in the 6.1 kernel. The platform
files for the rest of the routers have been reworked or based on newer
solutions.
Let's make the TL-WDR4900 consistent with them.
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
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