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/pci405/pci405.c b/board/esd/pci405/pci405.c
index 42774ad..0602abf 100644
--- a/board/esd/pci405/pci405.c
+++ b/board/esd/pci405/pci405.c
@@ -375,7 +375,7 @@
 
 U_BOOT_CMD(
 	wpeeprom,	2,	1,	do_wpeeprom,
-	"wpeeprom - Check/Enable/Disable I2C EEPROM write protection\n",
+	"Check/Enable/Disable I2C EEPROM write protection",
 	"wpeeprom\n"
 	"    - check I2C EEPROM write protection state\n"
 	"wpeeprom 1\n"