[2/2]smdk4412-common: exFAT Support

smdk4412: https://gerrit.omnirom.org/#/c/3044/

Change-Id: I8aabe8bb5e17ed8a407c70490a2cb73d1e34b23f
(cherry picked from commit 09dacf1011b44b1f54cf1f6e556d2113b33a680f)