ath79-nand: (re)add support for glinet_gl-ar300m (#2455)

Gone due to
commit 45c84a11 ("ar71xx: drop target")

Changed subtarget in between, similar change in
commit bed66fa2 ("ath79: move GL.iNet GL-AR750S to NAND subtarget")

docs/user/supported_devices.rst

@@ -105,6 +105,7 @@ ath79-nand
 
 * GL.iNet
 
+  - GL-AR300M
   - GL-AR750S
 
 brcm2708-bcm2708

targets/ath79-nand

@@ -7,6 +7,10 @@ local ATH10K_PACKAGES_QCA9887 = {
 }
 
 
+device('gl.inet-gl-ar300m-nor', 'glinet_gl-ar300m-nor', {
+	factory = false,
+})
+
 device('gl.inet-gl-ar750s-nor', 'glinet_gl-ar750s-nor', {
 	factory = false,
 	packages = ATH10K_PACKAGES_QCA9887,