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/amcc/acadia/cmd_acadia.c b/board/amcc/acadia/cmd_acadia.c
index 9fc03f1..d47cf1a 100644
--- a/board/amcc/acadia/cmd_acadia.c
+++ b/board/amcc/acadia/cmd_acadia.c
@@ -96,6 +96,6 @@
 
 U_BOOT_CMD(
 	bootstrap,	3,	0,	do_bootstrap,
-	"bootstrap - program the I2C bootstrap EEPROM\n",
+	"program the I2C bootstrap EEPROM",
 	"<cpu-freq> <nor|nand> - program the I2C bootstrap EEPROM\n"
 	);