klte-common: fix typo on fstab

We should ask kernel to mount with "defaults" not "default".

This fixes some filesystems such as EXT4 not mounting on external OTG storage.

Also fix some whitespaces to match grid with other lines.

Change-Id: I8d8bbb2c2d5e31c9c756cafcc498773bbd944c1b
Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>