treewide: Test on CONFIG_USB_HOST (or CONFIG_CMD_USB) not CONFIG_USB

As the logic here is only used when we have a USB host controller, test
on CONFIG_USB_HOST rather than CONFIG_USB in general.  This lets us move
towards using CONFIG_USB only as a menu symbol to say that we have some
form of USB, and then USB_HOST or USB_GADGET depending on the role that
USB plays within the build.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/lx2160a_common.h b/include/configs/lx2160a_common.h
index 15ea0e4..1338ee3 100644
--- a/include/configs/lx2160a_common.h
+++ b/include/configs/lx2160a_common.h
@@ -142,7 +142,7 @@
 #endif
 
 /* USB */
-#ifdef CONFIG_USB
+#ifdef CONFIG_USB_HOST
 #define CONFIG_HAS_FSL_XHCI_USB
 #ifndef CONFIG_TARGET_LX2162AQDS
 #define CONFIG_USB_MAX_CONTROLLER_COUNT	2
diff --git a/include/configs/stm32mp1.h b/include/configs/stm32mp1.h
index 2e7f49e..b372838 100644
--- a/include/configs/stm32mp1.h
+++ b/include/configs/stm32mp1.h
@@ -101,7 +101,7 @@
 #define BOOT_TARGET_UBIFS(func)
 #endif
 
-#ifdef CONFIG_USB
+#ifdef CONFIG_CMD_USB
 #define BOOT_TARGET_USB(func)	func(USB, usb, 0)
 #else
 #define BOOT_TARGET_USB(func)
diff --git a/include/configs/topic_miami.h b/include/configs/topic_miami.h
index c12cd7c..b668817 100644
--- a/include/configs/topic_miami.h
+++ b/include/configs/topic_miami.h
@@ -34,7 +34,7 @@
 
 /* Setup proper boot sequences for Miami boards */
 
-#if defined(CONFIG_USB)
+#if defined(CONFIG_USB_HOST)
 # define EXTRA_ENV_USB \
 	"usbreset=i2c dev 1 && i2c mw 41 1 ff && i2c mw 41 3 fe && "\
 		"i2c mw 41 1 fe && i2c mw 41 1 ff\0" \