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/am335x_gp_evm_defconfig b/configs/am335x_gp_evm_defconfig
index 554af51..9859189 100644
--- a/configs/am335x_gp_evm_defconfig
+++ b/configs/am335x_gp_evm_defconfig
@@ -20,6 +20,7 @@
 CONFIG_TIMER=y
 CONFIG_OMAP_TIMER=y
 CONFIG_USB=y
+CONFIG_USB_MUSB_HOST=y
 CONFIG_USB_MUSB_GADGET=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DOWNLOAD=y