staging: r8188eu: convert rtw_inc_and_chk_continual_urb_error() to bool

Function rtw_inc_and_chk_continual_urb_error() returns boolean values.
Change its return type from int to bool.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220329103756.6740-5-straube.linux@gmail.com


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