staging: vchiq_core: Factor out bulk transfer for (no/)callback mode

staging: vchiq_core: Factor out bulk transfer for (no/)callback mode

Factor out bulk transfer for VCHIQ_BULK_MODE_NOCALLBACK and
VCHIQ_BULK_MODE_CALLBACK mode into a separate dedicated function
bulk_xfer_callback_interruptible(). It is suffixed by "_interruptible"
to denote that it can be interrupted and -EAGAIN can be returned. It
would be up to the users of the function to retry the call in those cases.

bulk_xfer_callback_interruptible() also takes in 'mode' parameter to
differentiate between VCHIQ_BULK_MODE_NOCALLBACK and
VCHIQ_BULK_MODE_CALLBACK, which then is directly passed to
vchiq_bulk_xfer_queue_msg_interruptible() inside the function.

Adjust the calls to vchiq-dev.c ioctl interface and vchiq_arm.c
for the respective bulk transfers.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20240910051007.297227-5-umang.jain@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>