arm: dts: Fix missing device_type="memory" for ste-ccu8540

arm: dts: Fix missing device_type="memory" for ste-ccu8540

The current .dts for ste-ccu8540 lacks a 'device_type = "memory"' for
its memory node, relying on an old ppc quirk in order to discover its
memory. Fix the data so that all parsing code can handle it correctly.

Signed-off-by: Leif Lindholm <[email protected]>
Acked-by: Lee Jones <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Mark Rutland <[email protected]>
Cc: <[email protected]>
Signed-off-by: Grant Likely <[email protected]>