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/trizepsiv/eeprom.c b/board/trizepsiv/eeprom.c
index e11519a..63f1c6c 100644
--- a/board/trizepsiv/eeprom.c
+++ b/board/trizepsiv/eeprom.c
@@ -76,7 +76,7 @@
 
 U_BOOT_CMD(
 	dm9000ee,4,1,do_dm9000_eeprom,
-	"dm9000ee- Read/Write eeprom connected to Ethernet Controller\n",
+	"Read/Write eeprom connected to Ethernet Controller",
 	"\ndm9000ee write <word offset> <value> \n"
 	"\tdm9000ee read \n"
 	"\tword:\t\t00-02 : MAC Address\n"