staging: vt6655: correct documentation warnings

staging: vt6655: correct documentation warnings

Both arguments to set_channel have changed their names and their
types. Correct the discrepancy in the function documentation to get
rid of four warnings:

drivers/staging/vt6655/channel.c:165: warning: Function parameter or member 'priv' not described in 'set_channel'
drivers/staging/vt6655/channel.c:165: warning: Function parameter or member 'ch' not described in 'set_channel'
drivers/staging/vt6655/channel.c:165: warning: Excess function parameter 'pDeviceHandler' description in 'set_channel'
drivers/staging/vt6655/channel.c:165: warning: Excess function parameter 'uConnectionChannel' description in 'set_channel'

Signed-off-by: Edmundo Carmona Antoranz <eantoranz@gmail.com>
Link: https://lore.kernel.org/r/20210314145943.1933245-2-eantoranz@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>