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/ar405/ar405.c b/board/esd/ar405/ar405.c
index 3abcfe6..c4b4b67 100644
--- a/board/esd/ar405/ar405.c
+++ b/board/esd/ar405/ar405.c
@@ -247,7 +247,7 @@
 }
 U_BOOT_CMD(
 	digtest,	3,	1,	do_digtest,
-	"digtest - Test digital in-/output\n",
+	"Test digital in-/output",
 	NULL
 	);
 
@@ -341,7 +341,7 @@
 }
 U_BOOT_CMD(
 	anatest,	2,	1,	do_anatest,
-	"anatest - Test analog in-/output\n",
+	"Test analog in-/output",
 	NULL
 	);
 
@@ -408,7 +408,7 @@
 }
 U_BOOT_CMD(
 	inctest,	3,	1,	do_inctest,
-	"inctest - Test incremental encoder inputs\n",
+	"Test incremental encoder inputs",
 	NULL
 	);
 #endif