[MTD] Restore MTD_ROM and MTD_RAM types

Let's not attempt the abolition of mtd->type until/unless it's properly
thought through. And certainly, let's not do it by halves.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c
index fdb7a78..b3f665e 100644
--- a/drivers/mtd/devices/slram.c
+++ b/drivers/mtd/devices/slram.c
@@ -207,7 +207,7 @@
 	(*curmtd)->mtdinfo->read = slram_read;
 	(*curmtd)->mtdinfo->write = slram_write;
 	(*curmtd)->mtdinfo->owner = THIS_MODULE;
-	(*curmtd)->mtdinfo->type = MTD_GENERIC_TYPE;
+	(*curmtd)->mtdinfo->type = MTD_RAM;
 	(*curmtd)->mtdinfo->erasesize = SLRAM_BLK_SZ;
 
 	if (add_mtd_device((*curmtd)->mtdinfo))	{