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/mpl/pati/cmd_pati.c b/board/mpl/pati/cmd_pati.c
index 9d9531b..95bfdcc 100644
--- a/board/mpl/pati/cmd_pati.c
+++ b/board/mpl/pati/cmd_pati.c
@@ -427,7 +427,7 @@
 
 U_BOOT_CMD(
 	pati,	8,	1,	do_pati,
-	"pati    - PATI specific Cmds\n",
+	"PATI specific Cmds",
 	"info - displays board information\n"
 	"pati pci  - displays PCI registers\n"
 	"pati led <nr> <on> \n"