staging: most: dim2: replace function parameter with the expression

This replaces the function parameter sync_mfe with the expression
(ch_type == CAT_CT_VAL_SYNC) what is the same.

Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>