s5j/serial: rename UFSTAT bitfield
For better consistency,
s/UART_UFSTAT_RX_FIFO_MASK/UART_UFSTAT_RX_FIFO_FULL_MASK/
#define UART_UFSTAT_RX_FIFO_ERROR (0x1 << UART_UFSTAT_RX_FIFO_ERROR_SHIFT)
#define UART_UFSTAT_RX_FIFO_FULL_SHIFT 8
-#define UART_UFSTAT_RX_FIFO_MASK (0x1 << UART_UFSTAT_RX_FIFO_FULL_SHIFT)
+#define UART_UFSTAT_RX_FIFO_FULL_MASK (0x1 << UART_UFSTAT_RX_FIFO_FULL_SHIFT)
#define UART_UFSTAT_RX_FIFO_FULL (0x1 << UART_UFSTAT_RX_FIFO_FULL_SHIFT)
#define UART_UFSTAT_RX_FIFO_COUNT_SHIFT 0
