[Keyboard] PloopyCo update and fixes (#10936)

This is based on feedback talking with crop_octagon about the device.  Future trackballs will ship with ATMEL DFU for simplicity.  This also includes some fixes and optimizations based on code review and tinkering on my own devices.

keyboards/ploopyco/pmw3360.c

@@ -213,7 +213,7 @@ report_pmw_t pmw_read_burst(void) {
     data.dx |= (data.mdx << 8);
     data.dx = data.dx * -1;
     data.dy |= (data.mdy << 8);
-    // data.dy = data.dy * -1;
+    data.dy = data.dy * -1;
 
     spi_stop();