file_system/fat: Rework driver for fs_shell support

* Introduce fat_shell for build system fat manipulation
* Will theoretically let us do away with mtools when we
have another internal tool for partition manipulation

Change-Id: I661be556e79009842f157a9402c8f85da85d6336
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3556
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Just a bit of cleanup, remove trailing whitespace mostly. No functional changes.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24995 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Ported the FAT filesystem to the recent filesystem interface changes which
was, thanks to the detailed instructions from Ingo, quite doable.
* Ported the (deprecated and now publically removed) notify_listener() calls
to the respective new notify_* calls.
* Fixed debug build.
* Added the FAT filesystem back to the image.

I only tested the filesystem briefly and everything seemed to work as expected
(mounted the FAT part of my bootable Haiku memory stick, opened a few files
and copied something to it). At least it should not be any more broken than
before the interface changes ;-).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24987 a95241bf-73f2-0310-859d-f6bbb57e9c96

Renamed "dos" file system to "fat".


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22316 a95241bf-73f2-0310-859d-f6bbb57e9c96

Just a bit of cleanup, remove trailing whitespace mostly. No functional changes.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24995 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Ported the FAT filesystem to the recent filesystem interface changes which
was, thanks to the detailed instructions from Ingo, quite doable.
* Ported the (deprecated and now publically removed) notify_listener() calls
to the respective new notify_* calls.
* Fixed debug build.
* Added the FAT filesystem back to the image.

I only tested the filesystem briefly and everything seemed to work as expected
(mounted the FAT part of my bootable Haiku memory stick, opened a few files
and copied something to it). At least it should not be any more broken than
before the interface changes ;-).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24987 a95241bf-73f2-0310-859d-f6bbb57e9c96

Renamed "dos" file system to "fat".


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22316 a95241bf-73f2-0310-859d-f6bbb57e9c96