colibri_imx7: add compatible string used in vanilla Linux

Device trees from vanilla Linux do not specify a i.MX 7 specific
compatible string. Make sure to set partitions also when booting
upstream Linux.
Signed-off-by: NStefan Agner <stefan.agner@toradex.com>

board/toradex/colibri_imx7/colibri_imx7.c

@@ -391,6 +391,7 @@ int ft_board_setup(void *blob, bd_t *bd)
 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
 	static struct node_info nodes[] = {
 		{ "fsl,imx7d-gpmi-nand", MTD_DEV_TYPE_NAND, }, /* NAND flash */
+		{ "fsl,imx6q-gpmi-nand", MTD_DEV_TYPE_NAND, },
 	};
 
 	/* Update partition nodes using info from mtdparts env var */