[DRIVERS] Add ATAPI device read support

Signed-off-by: Himanshu Chauhan <hschauhan@nulltrace.org>
[VFS] Add readonly support for ISO9660 filesystem

Add support for ISO9660 with rockridge extentions support
for Unix modes.

Signed-off-by: Himanshu Chauhan <hschauhan@nulltrace.org
[x86] Disable Xvisor banner for x86.

Signed-off-by: Himanshu Chauhan <hschauhan@nulltrace.org>
[COMMANDS] Print extra '/' after directory name.

In 'vfs ls' command, print an extra '/' after the directory
name for visual differentiation.

Signed-off-by: Himanshu Chauhan <hschauhan@nulltrace.org>