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In prom_putchar(), wait for just the TX empty bit to clear in the UART LSR. Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com> Cc: linux-mips@linux-mips.org Cc: Florian Fainelli <florian@openwrt.org> Patchwork: https://patchwork.linux-mips.org/patch/4112/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>