USB: rename USB OTG hub configuration option

The USB OTG code has the ability to disable external hubs, but the
configuration option for it is oddly named. Rename it to be more
obvious as to what it does.

Cc: Thomas Bogendoerfer <[e-mail]>
Cc: Bin Liu <[e-mail]>
Cc: Paul Cercueil <[e-mail]>
Cc: Alan Stern <[e-mail]>
Cc: Eugeniu Rosca <[e-mail]>
Cc: Kai-Heng Feng <[e-mail]>
Cc: David Heinzelmann <[e-mail]>
Cc: "Lee, Chiasheng" <[e-mail]>
Cc: Keiya Nobuta <[e-mail]>
Cc: Hardik Gajjar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

arch/mips/configs/gcw0_defconfig

···
 CONFIG_USB_CONN_GPIO=y
 CONFIG_USB=y
 CONFIG_USB_OTG=y
-CONFIG_USB_OTG_BLACKLIST_HUB=y
+CONFIG_USB_OTG_DISABLE_EXTERNAL_HUB=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_HCD_PLATFORM=y
 CONFIG_USB_MUSB_HDRC=y

drivers/usb/core/Kconfig

···
 	  "Targeted Peripherals List".  "Embedded Hosts" are likewise
 	  allowed to support only a limited number of peripherals.
 
-config USB_OTG_BLACKLIST_HUB
+config USB_OTG_DISABLE_EXTERNAL_HUB
 	bool "Disable external hubs"
 	depends on USB_OTG || EXPERT
 	help

drivers/usb/core/hub.c

···
 		return -E2BIG;
 	}
 
-#ifdef	CONFIG_USB_OTG_BLACKLIST_HUB
+#ifdef	CONFIG_USB_OTG_DISABLE_EXTERNAL_HUB
 	if (hdev->parent) {
 		dev_warn(&intf->dev, "ignoring external hub\n");
 		return -ENODEV;

drivers/usb/musb/Kconfig

···
 	depends on OF
 	depends on MIPS || COMPILE_TEST
 	depends on USB_MUSB_GADGET
-	depends on USB=n || USB_OTG_BLACKLIST_HUB
+	depends on USB=n || USB_OTG_DISABLE_EXTERNAL_HUB
 	select USB_ROLE_SWITCH
 
 config USB_MUSB_MEDIATEK

drivers/usb/musb/musb_core.c

···
 		musb->is_multipoint = 0;
 		type = "";
 		if (IS_ENABLED(CONFIG_USB) &&
-		    !IS_ENABLED(CONFIG_USB_OTG_BLACKLIST_HUB)) {
-			pr_err("%s: kernel must blacklist external hubs\n",
+		    !IS_ENABLED(CONFIG_USB_OTG_DISABLE_EXTERNAL_HUB)) {
+			pr_err("%s: kernel must disable external hubs, please fix the configuration\n",
 			       musb_driver_name);
 		}
 	}