Fix dtb path and swap priorities

since dtb_files directive has been fixed in l-i-t, it's now honoured.

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
diff --git a/hwpacks/linaro-midway b/hwpacks/linaro-midway
index d052203..768501e 100644
--- a/hwpacks/linaro-midway
+++ b/hwpacks/linaro-midway
@@ -22,8 +22,8 @@
 initrd_file: boot/initrd.img-*-midway
 dtb_file: lib/firmware/*-midway/device-tree/ecx-2000.dtb
 dtb_files:
-- highbank.dtb: lib/firmware/*-highbank/device-tree/highbank.dtb
-- ecx-2000.dtb: lib/firmware/*-highbank/device-tree/ecx-2000.dtb
+- ecx-2000.dtb: lib/firmware/*-midway/device-tree/ecx-2000.dtb
+- highbank.dtb: lib/firmware/*-midway/device-tree/highbank.dtb
 boot_script: boot.scr
 extra_serial_options:
 - console=ttyAMA0,115200n8