#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */
#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */
+#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
#define PROBE_RSA (1 << 0)
#define PROBE_ANY (~0)