docs: accel: Fix debugfs path

The device specific directory in debugfs does not have "accel". For
example, the documentation says device 0 should have a debugfs entry as
/sys/kernel/debug/accel/accel0/ but in reality the entry is
/sys/kernel/debug/accel/0/

Fix the documentation to match the implementation.

Fixes: 8c5577a5ccc6 ("doc: add documentation for accel subsystem")
Signed-off-by: Jeffrey Hugo <[e-mail]>
Reviewed-by: Oded Gabbay <[e-mail]>
Signed-off-by: Oded Gabbay <[e-mail]>

Documentation/accel/introduction.rst

···
 
 - device char files - /dev/accel/accel*
 - sysfs             - /sys/class/accel/accel*/
-- debugfs           - /sys/kernel/debug/accel/accel*/
+- debugfs           - /sys/kernel/debug/accel/*/
 
 Getting Started
 ===============