uart/exynos: be explicit about unused return value
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@ -193,7 +193,7 @@ class Genode::Exynos_uart: Mmio
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*/
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char _rx_char()
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{
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read<Ufcon>();
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(void)read<Ufcon>();
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char c = read<Urxh::Receive_data>();
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/* clear pending RX IRQ */
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