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/esd/common/lcd.c b/board/esd/common/lcd.c
index 1db8d90..066df74 100644
--- a/board/esd/common/lcd.c
+++ b/board/esd/common/lcd.c
@@ -372,6 +372,6 @@
 
 U_BOOT_CMD(
 	esdbmp,	2,	1,	do_esdbmp,
-	"esdbmp   - display BMP image\n",
+	"display BMP image",
 	"<imageAddr> - display image\n"
 );