stdio/device: rework function naming convention

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>
diff --git a/include/configs/gr_ep2s60.h b/include/configs/gr_ep2s60.h
index 6f58bac..7b0a08f 100644
--- a/include/configs/gr_ep2s60.h
+++ b/include/configs/gr_ep2s60.h
@@ -87,7 +87,7 @@
 #define CONFIG_CMD_USB
 #define CONFIG_USB_STORAGE
 /* Enable needed helper functions */
-#define CONFIG_SYS_DEVICE_DEREGISTER	/* needs device_deregister */
+#define CONFIG_SYS_STDIO_DEREGISTER	/* needs stdio_deregister */
 #endif
 
 /*