Revert "drm/vc4: hdmi: Make sure the device is powered with CEC" again

This reverts commit 55b10b8 which is
commit 20b0dfa upstream.

It wasn't applied correctly, something went wrong with an attempt to fix
it up again, so just revert the whole thing to be back at a clean state.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220205171238.GA3073350@roeck-us.net
Reported-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Link: https://lore.kernel.org/r/Yf5lNIJnvhP4ajam@kroah.com
Cc: Dave Stevenson <dave.stevenson@raspberrypi.com>
Cc: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpu/drm/vc4/vc4_hdmi.c

@@ -1399,14 +1399,8 @@ static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
 	struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
 	/* clock period in microseconds */
 	const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
-	u32 val;
-	int ret;
-
-	ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
-	if (ret)
-		return ret;
+	u32 val = HDMI_READ(HDMI_CEC_CNTRL_5);
 
-	val = HDMI_READ(HDMI_CEC_CNTRL_5);
 	val &= ~(VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET |
 		 VC4_HDMI_CEC_CNT_TO_4700_US_MASK |
 		 VC4_HDMI_CEC_CNT_TO_4500_US_MASK);
@@ -1531,8 +1525,6 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
 	if (ret < 0)
 		goto err_delete_cec_adap;
 
-	pm_runtime_put(&vc4_hdmi->pdev->dev);
-
 	return 0;
 
 err_delete_cec_adap: