drivers/crypto/fsl: remove redundant logical contraint

'A || (!A && B)' is equivalent to 'A || B'.
Let's reduce the complexity of the statement in start_jr0().

The problem was indicated by cppcheck.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: York Sun <york.sun@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>