[kernel] video: rockchip: hdmi: fix parsing 1st block edid

If parsing 1st block edid failed, we think it is good
only when there is more than one external block.

Change-Id: I1eb11405dade41ebb2ad041ba909de0c7ea120f8
Signed-off-by: Firefly <service@t-firefly.com>
(cherry picked from commit 1d9b35e9d10839a9d513eed551034fd02e855f92)

kernel/drivers/video/rockchip/hdmi/rockchip-hdmi-edid.c

@@ -122,7 +122,8 @@ int hdmi_edid_parse_base(unsigned char *buf,
 	fb_edid_to_monspecs(buf, pedid->specs);
 
 out:
-	if (rc != E_HDMI_EDID_SUCCESS && *extend_num > 4)
+	if ((rc != E_HDMI_EDID_SUCCESS) &&
+	    (*extend_num < 1 && *extend_num > 4))
 		return rc;
 	else
 		return E_HDMI_EDID_SUCCESS;