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_pcmcia.c b/common/cmd_pcmcia.c
index 23fad3b..e448456 100644
--- a/common/cmd_pcmcia.c
+++ b/common/cmd_pcmcia.c
@@ -88,7 +88,7 @@
 
 U_BOOT_CMD(
 	pinit,	2,	0,	do_pinit,
-	"pinit   - PCMCIA sub-system\n",
+	"PCMCIA sub-system",
 	"on  - power on PCMCIA socket\n"
 			"pinit off - power off PCMCIA socket\n"
 	  );