Added UART DCC support for armv8

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

Signed-off-by: Alexander Merkle <alexander.merkle@lauterbach.com>

Use default_serial_puts() instead of its own implementation.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Michal Simek <monstr@monstr.eu>

Register arm_dcc with drivers/serial/serial.c

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Removed stdio structure ops support on arm_dcc
driver, and need to register with serial core
so-that it can access like remianing serial drivers.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

- arm_dcc_dev is already initialized.
- Remove unused rc variable
Warning log:
arm_dcc.c: In function 'drv_arm_dcc_init':
arm_dcc.c:145:6: warning: unused variable 'rc' [-Wunused-variable]

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Marek Vasut <marex@denx.de>

CONFIG_ARM_DCC_MULTI should be also removed in the patch
"serial: Remove CONFIG_SERIAL_MULTI from serial drivers"
(sha1: a3827250606895ec2dd4b8d867342b7cabf3692f)
Because the driver defines serial_* functions
which cause conflict with serial.c (multiple definition of serial_*)

Removing CONFIG_SERIAL_MULTI function also require to define
default_serial_console for cases where another serial driver
is not available in the system.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Marek Vasut <marex@denx.de>

So far the console API uses the following naming convention:

	======Extract======
	typedef struct device_t;

	int	device_register (device_t * dev);
	int	devices_init (void);
	int	device_deregister(char *devname);
	struct list_head* device_get_list(void);
	device_t* device_get_by_name(char* name);
	device_t* device_clone(device_t *dev);
	=======

which is too generic and confusing.

Instead of using device_XX and device_t we change this
into stdio_XX and stdio_dev

This will also allow to add later a generic device mechanism in order
to have support for multiple devices and driver instances.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Edited commit message.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

the dcc can be used at the start of the cpu

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>