Parse GPS DOP values (#11912)

This is part 2 of a series to prepare for altitude estimations (and
later on full 3-dimensional estimations) with a new sensor fusion model.

This is a PR to get access to relevant dilution of precision values of
the GPS signal.
- `pDOP`: positional (3D) - for positional dilution in space
- `hDOP`: horizontal (2D) - for positional dilution above ground
- `vDOP`: vertical (1D) - for dilution of altitude

src/main/osd/osd_elements.c

@@ -1066,7 +1066,7 @@ static void osdElementGpsSats(osdElementParms_t *element)
         int pos = tfp_sprintf(element->buff, "%c%c%2d", SYM_SAT_L, SYM_SAT_R, gpsSol.numSat);
         if (osdConfig()->gps_sats_show_hdop) { // add on the GPS module HDOP estimate
             element->buff[pos++] = ' ';
-            osdPrintFloat(element->buff + pos, SYM_NONE, gpsSol.hdop / 100.0f, "", 1, true, SYM_NONE);
+            osdPrintFloat(element->buff + pos, SYM_NONE, gpsSol.dop.hdop / 100.0f, "", 1, true, SYM_NONE);
         }
     }
 }