Fix dolphin start script to work across supported devices.

packages/games/emulators/dolphinsa/package.mk

@@ -71,3 +71,16 @@ makeinstall_target() {
   cp -rf ${PKG_BUILD}/Data/Sys/* ${INSTALL}/usr/config/dolphin-emu
   cp -rf ${PKG_DIR}/config/${DEVICE}/* ${INSTALL}/usr/config/dolphin-emu
 }
+
+post_install() {
+    case ${DEVICE} in
+      RG503|RG353P)
+        DOLPHIN_PLATFORM="drm"
+      ;;
+      *)
+        DOLPHIN_PLATFORM="x11"
+      ;;
+    esac
+    sed -e "s/@DOLPHIN_PLATFORM@/${DOLPHIN_PLATFORM}/g" \
+        -i  ${INSTALL}/usr/bin/start_dolphin.sh
+}

packages/games/emulators/dolphinsa/scripts/start_dolphin.sh

@@ -18,4 +18,4 @@ rm -rf /storage/.local/share/dolphin-emu
 
 ln -sfv /storage/.config/dolphin-emu /storage/.local/share/dolphin-emu
 
-/usr/bin/dolphin-emu-nogui -p drm -a HLE -e "${1}"
+/usr/bin/dolphin-emu-nogui -p @DOLPHIN_PLATFORM@ -a HLE -e "${1}"