Revert "exFAT support"

This reverts commit f26654c0377598b431a21d55bbab3c9dc2120f69.

Change-Id: Ie7196f69552ef6be0157ed9c2406d07133088723
Merge "Revert "exFAT support"" into cm-11.0
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_kernel_htc_msm8974 into HEAD