configs: Re-sync CONFIG_USB_MUSB_HOST

Now that CONFIG_USB_MUSB_HOST is part of Kconfig, migrate that over to
the defconfig files.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/thuban_defconfig b/configs/thuban_defconfig
index c051460..c81e411 100644
--- a/configs/thuban_defconfig
+++ b/configs/thuban_defconfig
@@ -14,6 +14,7 @@
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
+CONFIG_USB_MUSB_HOST=y
 CONFIG_USB_MUSB_GADGET=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DOWNLOAD=y