togari: support mass storage USB modes

Change-Id: I890f03778d294a3530cf9ece3cb82d5048d2d584
Signed-off-by: Arnav Gupta <championswimmer@aokp.co>
togari: allow external SD to be mounted as Mass Storage volume

Change-Id: I7f94c3ceaca6e67e560628e85a3e6c47071003e8
Signed-off-by: Arnav Gupta <championswimmer@aokp.co>