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/lwmon/lwmon.c b/board/lwmon/lwmon.c
index 257f1cd..1b665a9 100644
--- a/board/lwmon/lwmon.c
+++ b/board/lwmon/lwmon.c
@@ -851,7 +851,7 @@
 }
 U_BOOT_CMD(
 	pic,	4,	1,	do_pic,
-	"pic     - read and write PIC registers\n",
+	"read and write PIC registers",
 	"read  reg      - read PIC register `reg'\n"
 	"pic write reg val  - write value `val' to PIC register `reg'\n"
 );
@@ -910,7 +910,7 @@
 
 U_BOOT_CMD(
 	kbd,	1,	1,	do_kbd,
-	"kbd     - read keyboard status\n",
+	"read keyboard status",
 	NULL
 );
 
@@ -982,7 +982,7 @@
 
 U_BOOT_CMD(
 	lsb,	2,	1,	do_lsb,
-	"lsb     - check and set LSB switch\n",
+	"check and set LSB switch",
 	"on  - switch LSB on\n"
 	"lsb off - switch LSB off\n"
 	"lsb     - print current setting\n"