Add Realme 3 Pro Co-Maintainer

Change-Id: I460ec333fb96b4583e0410db7d139d19f879b687
diff --git a/_oppo/realme3pro.markdown b/_oppo/realme3pro.markdown
index 67d6cec..634c3d9 100644
--- a/_oppo/realme3pro.markdown
+++ b/_oppo/realme3pro.markdown
@@ -4,7 +4,7 @@
 codename: RMX1851
 downloadfolder: RMX1851
 supportstatus: Current
-maintainer: SamarV-121
+maintainer: SamarV-121, mauronofrio
 oem: Oppo
 devicetree: https://github.com/TeamWin/android_device_oppo_RMX1851
 ---