Recovery: mount non-vfat external sd cards

Set fs type to auto for external sd cards to allow for non-vfat
formatted sd card, ie ext4

Change-Id: I92588e29b5eefd590db7b7c68e303488069a660d

Conflicts:

	recovery.fstab
d2: Add stereo mic device

Change-Id: I232ce0aff9ed7bca7a9088b06eb571424ee31620