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/common/cmd_universe.c b/common/cmd_universe.c
index ea97782..bfb91b58 100644
--- a/common/cmd_universe.c
+++ b/common/cmd_universe.c
@@ -364,7 +364,7 @@
 
 U_BOOT_CMD(
 	universe,	8,	1,	do_universe,
-	"universe- initialize and configure Turndra Universe\n",
+	"initialize and configure Turndra Universe",
 	"init\n"
 	"    - initialize universe\n"
 	"universe vme [vme_addr] [pci_addr] [size] [vam] [pms]\n"