WORKAROUND: arm64: configs: tizen_*: enable acm gadget and its dummy mode

WORKAROUND: arm64: configs: tizen_*: enable acm gadget and its dummy mode

To support tizen gadget mode of deviced, acm gadget is required
because it is always in device mode configuration. But there is issue
for using too mant gadget functions because of amlogic usb endpoint
fifo limitation. So, eanble acm gadget and its dummy mode.

Note: When usb device mode config is possible to set mtp and sdb only,
then this workaround can be removed.

Change-Id: Iacffadce2acdd78845002ff2db6b224a09f4bfe0
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>