staging: vt6655: fix camelcase in byRate

Replace camel case function parameter name byRate (hungarian notation)
with snake case equivalent, in card.c

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
Link: https://lore.kernel.org/r/20211007161535.7563-1-tomm.merciai@gmail.com


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