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/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index b9edf0d..1e0b35a 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -13,4 +13,6 @@
 CONFIG_CMD_GPIO=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_USB_MUSB_HOST=y
 CONFIG_OF_LIBFDT=y