Do not break field access within assumptions
Kirill Shilimanov noticed that "IS_ERR(cec->clk_hdmi_cec)" was replaced with "IS_ERR(cec-<=clk_hdmi_cec)" when checking drivers:clk2 for drivers/media/cec/platform/stm32/stm32-cec.ko. This a consequence of heuristic replacement of conditions to take into account their negative forms. In this case we need to use "!" before the expression.