Command usage cleanup

Remove command name from all command "usage" fields and update
common/command.c to display "name - usage" instead of
just "usage". Also remove newlines from command usage fields.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/cm5200/cmd_cm5200.c b/board/cm5200/cmd_cm5200.c
index 00f0671..52f031c 100644
--- a/board/cm5200/cmd_cm5200.c
+++ b/board/cm5200/cmd_cm5200.c
@@ -435,7 +435,7 @@
 
 U_BOOT_CMD(
 	fkt,	4,	1,	cmd_fkt,
-	"fkt     - Function test routines\n",
+	"Function test routines",
 	"i2c\n"
 	"     - Test I2C communication\n"
 	"fkt led\n"