usb: musb-new: CONFIG_MUSB prefix replacement with CONFIG_USB_MUSB

USB-related options are usually prefixed with CONFIG_USB and platform-specific
adaptation for the MUSB controller already have a CONFIG_USB_MUSB prefix, so
this switches all MUSB-related options to a CONFIG_USB_MUSB prefix, for
consistency.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/include/configs/bav335x.h b/include/configs/bav335x.h
index fa32fa4..9917627 100644
--- a/include/configs/bav335x.h
+++ b/include/configs/bav335x.h
@@ -440,14 +440,14 @@
  */
 #define CONFIG_USB_MUSB_DSPS
 #define CONFIG_ARCH_MISC_INIT
-#define CONFIG_MUSB_GADGET
-#define CONFIG_MUSB_PIO_ONLY
-#define CONFIG_MUSB_DISABLE_BULK_COMBINE_SPLIT
+#define CONFIG_USB_MUSB_GADGET
+#define CONFIG_USB_MUSB_PIO_ONLY
+#define CONFIG_USB_MUSB_DISABLE_BULK_COMBINE_SPLIT
 #define CONFIG_USB_GADGET
 #define CONFIG_USB_GADGET_DOWNLOAD
 #define CONFIG_USB_GADGET_DUALSPEED
 #define CONFIG_USB_GADGET_VBUS_DRAW	2
-#define CONFIG_MUSB_HOST
+#define CONFIG_USB_MUSB_HOST
 #define CONFIG_AM335X_USB0
 #define CONFIG_AM335X_USB0_MODE	MUSB_PERIPHERAL
 #define CONFIG_AM335X_USB1
@@ -466,12 +466,12 @@
 #define CONFIG_FASTBOOT_FLASH_MMC_DEV   1
 #endif
 
-#ifdef CONFIG_MUSB_HOST
+#ifdef CONFIG_USB_MUSB_HOST
 #define CONFIG_CMD_USB
 #define CONFIG_USB_STORAGE
 #endif
 
-#ifdef CONFIG_MUSB_GADGET
+#ifdef CONFIG_USB_MUSB_GADGET
 #define CONFIG_CMD_USB_MASS_STORAGE
 #define CONFIG_USB_FUNCTION_MASS_STORAGE
 
@@ -479,11 +479,11 @@
 #define CONFIG_G_DNL_VENDOR_NUM 0x0451
 #define CONFIG_G_DNL_PRODUCT_NUM 0xD022
 #define CONFIG_G_DNL_MANUFACTURER "Texas Instruments"
-#endif /* CONFIG_MUSB_GADGET */
+#endif /* CONFIG_USB_MUSB_GADGET */
 
 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_USBETH_SUPPORT)
 /* disable host part of MUSB in SPL */
-#undef CONFIG_MUSB_HOST
+#undef CONFIG_USB_MUSB_HOST
 /* disable EFI partitions and partition UUID support */
 #undef CONFIG_PARTITION_UUIDS
 #undef CONFIG_EFI_PARTITION