mediatek: move mt7623 support into a 32bit subtarget

this is in preparation for adding the new 64bit mt7622 support.

Signed-off-by: John Crispin <john@phrozen.org>

target/linux/mediatek/32/profiles/default.mk

@@ -0,0 +1,15 @@
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+define Profile/Default
+	NAME:=Default Profile (minimum package set)
+endef
+
+define Profile/Default/Description
+	Default package set compatible with most boards.
+endef
+$(eval $(call Profile,Default))

target/linux/mediatek/32/target.mk

@@ -0,0 +1,13 @@
+#
+# Copyright (C) 2009 OpenWrt.org
+#
+
+SUBTARGET:=32
+BOARDNAME:=32bit
+CPU_TYPE:=cortex-a7
+CPU_SUBTYPE:=neon-vfpv4
+
+define Target/Description
+	Build firmware images for MediaTek 32bit ARM based boards.
+endef
+