staging: vc04_services: fix indent in vchiq_debugfs_node

Fix checkpatch.pl warning regarding space indents and replace it with
tabs to comply with kernel coding style.

Signed-off-by: Bastien Maureille <bastien.maureille@gmail.com>
Link: https://lore.kernel.org/r/20210222181812.268909-1-bastien.maureille@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>