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/esd/cpci2dp/cpci2dp.c b/board/esd/cpci2dp/cpci2dp.c
index dcab906..517b174 100644
--- a/board/esd/cpci2dp/cpci2dp.c
+++ b/board/esd/cpci2dp/cpci2dp.c
@@ -176,7 +176,7 @@
 
 U_BOOT_CMD(
 	eepwren,	2,	0,	do_eep_wren,
-	"eepwren - Enable / disable / query EEPROM write access\n",
+	"Enable / disable / query EEPROM write access",
 	NULL
 	);
 #endif /* #if defined(CONFIG_SYS_EEPROM_WREN) */