Update openwrt docs

platforms/README.md

@@ -17,7 +17,7 @@ Linux                                        22.97s
 Native C implementation                       2.55s
 Linux                                        50.00s
 
-### VoCore2  (MT7628 @ 580 MHz)
+### VoCore2  (MT7628AN @ 580 MHz)
 Native C implementation                       6.21s
 OpenWRT                                      2m 38s
 ```

platforms/openwrt/README.md

@@ -7,7 +7,7 @@ This is **wasm3** package for **OpenWRT**.
 ## Build from source
 
 ```bash
-echo "src-git wasm3 git://github.com/vshymanskyy/OpenWRT-wasm3-packages.git" >> ./feeds.conf
+echo "src-link wasm3 $(M3_ROOT)/platforms/openwrt/" >> ./feeds.conf
 ./scripts/feeds update -a
 ./scripts/feeds install -p wasm3 -a
 make menuconfig