staging: vc04_services: get rid of vchiq_platform_use_suspend_timer()

The function always returns 0, delete the function and all code
conditional to it, namely the suspend timer.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200131103836.14312-7-nsaenzjulienne@suse.de


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