ARM: at91: at91rm9200 use SoC detection infrastructure

Use the soc detection infrastructure for at91rm9200 initialization.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/soc.h b/arch/arm/mach-at91/soc.h
index 9678a3b..ab5bc4b 100644
--- a/arch/arm/mach-at91/soc.h
+++ b/arch/arm/mach-at91/soc.h
@@ -32,4 +32,6 @@
 struct soc_device * __init
 at91_soc_init(const struct at91_soc *socs);
 
+#define AT91RM9200_CIDR_MATCH		0x09290780
+
 #endif /* __AT91_SOC_H */