[ARM] 4908/1: [AT91] RTT platform_device fix

The RTT-as-RTC driver will search for the user-specified RTT
peripheral via ID number (0 .. 1).
Therefore if the processor only contains a single RTT peripheral, we
need to set its platform_device.id to "0" instead of "-1".
Also add the missing platform_device resource for the CAP9 processor.

Bug reported by Sedji Gaouaou.

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-at91/at91sam9261_devices.c

@@ -561,7 +561,7 @@ static struct resource rtt_resources[] = {
 
 static struct platform_device at91sam9261_rtt_device = {
 	.name		= "at91_rtt",
-	.id		= -1,
+	.id		= 0,
 	.resource	= rtt_resources,
 	.num_resources	= ARRAY_SIZE(rtt_resources),
 };