staging: vc04_services: Drop VCHIQ_ERROR usage

[ Upstream commit ab73dc85 ]

Drop the usage of VCHIQ_ERROR vchiq_status enum type. Replace it with
-EINVAL to report the error in most cases, -ENOMEM for out-of-memory
errors and -EHOSTDOWN for service shutdown.

This patch acts as intermediatory to address the TODO item:
    * Get rid of custom function return values
for vc04_services/interface.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/20221223122404.170585-4-umang.jain@ideasonboard.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: f2b8ebfb ("staging: vchiq_arm: Make vchiq_shutdown never fail")
Signed-off-by: Sasha Levin <sashal@kernel.org>