Fix FB_PIXELS() macro.
Fix FB_PIXELS() macro.

* If bpp > 2 (means JPEG image) return pixels + bpp (bpp stores image size in JPEG mode)
* If bpp <= 2 (means GS or RGB image) return pixels + w * h * bpp.

kwagyeman/openmv,kwagyeman/openmv,openmv/openmv,openmv/openmv,openmv/openmv,kwagyeman/openmv,kwagyeman/openmv,iabdalkader/openmv,iabdalkader/openmv,iabdalkader/openmv,iabdalkader/openmv,openmv/openmv