staging: i4l: act2000: do not assign in if

It is not the kernel coding style to assign values to some variable in
if statement. Split them up into different statements.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>