[rdc] add support for 2.6.28 and use it as the default kernel version, tested on Airlink AR525W and RDC8610 eval board

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15382 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/rdc/files-2.6.28/drivers/mtd/maps/imghdr.h

@@ -0,0 +1,25 @@
+#ifndef GT_IMGHDR_H
+#define GT_IMGHDR_H
+
+#define GTIMG_MAGIC		"GMTK"
+
+/* Product ID */
+#define PID_RTL_AIRGO		1
+#define PID_RTL_RALINK		2
+#define PID_RDC_AIRGO		3
+#define PID_RDC_RALINK		5	/* White Lable */
+
+/* Gemtek */
+typedef struct
+{
+	u8		magic[4];		/* ASICII: GMTK */
+	u32		checksum;		/* CRC32 */
+	u32		version;		/* x.x.x.x */
+	u32		kernelsz;		/* The size of the kernel image */
+	u32		imagesz;		/* The length of this image file ( kernel + romfs + this header) */
+	u32		pid;			/* Product ID */
+	u32		fastcksum;		/* Partial CRC32 on (First(256), medium(256), last(512)) */
+	u32		reserved;
+}gt_imghdr_t;
+
+#endif