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_otp.c b/common/cmd_otp.c
index bdf2e6a..e27bb29 100644
--- a/common/cmd_otp.c
+++ b/common/cmd_otp.c
@@ -155,7 +155,7 @@
 }
 
 U_BOOT_CMD(otp, 6, 0, do_otp,
-	"otp - One-Time-Programmable sub-system\n",
+	"One-Time-Programmable sub-system",
 	"read <addr> <page> [count] [half]\n"
 	"otp write [--force] <addr> <page> [count] [half]\n"
 	"    - read/write 'count' half-pages starting at page 'page' (offset 'half')\n");