serial: cpu_uart: Remove unused uart_cpm_port fields

	unsigned char		*tx_buf;

	unsigned char		*rx_buf;

	u32			flags;

	void			(*set_lineif)(struct uart_cpm_port *);

	struct clk		*clk;

	u8			brg;

	uint			 dp_addr;

	void			*mem_addr;

	dma_addr_t		 dma_addr;

	u32			mem_size;

	/* helpers */

	int			 baud;

	int			 bits;

	/* Keep track of 'odd' SMC2 wirings */

	int			is_portb;

	/* wait on close if needed */

	int			wait_closing;

	/* value to combine with opcode to form cpm command */