Further reduce OV5640 drive strength

Further testing revealed 2x was still too much. 1x seems much more stable.
Also fix erroneous extra bit getting set (not documented in datasheet, so probably shouldn't be changing it).

Author: sfe-SparkFro

red_vision/cameras/ov5640.py

@@ -417,7 +417,7 @@ class OV5640(DVP_Camera):
         # io direction
         0x3017, 0xFF,
         0x3018, 0xFF,
-        _DRIVE_CAPABILITY, 0x43, # 2x drive strength
+        _DRIVE_CAPABILITY, 0x02, # 1x drive strength
         _CLOCK_POL_CONTROL, 0x21,
         0x4713, 0x02,  # jpg mode select
         _ISP_CONTROL_01, 0x83,  # turn color matrix, awb and SDE