arm: omap3: Update cpuinfo for DM3730, DM3725, AM3715, and AM3703

The check for OMAP3630/3730 only checks for 800MHz 3630/3730, but
anything else is lumped into 36XX/37XX with an assumed 1GHz speed.

Based on the DM3730 TRM bit 9 shows the MPU Frequency (800MHz/1GHZ).
This also adds the ability to distinguish between the DM3730, DM3725,
AM3715, and AM3703 and correctly display their maximum speed.

Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
diff --git a/arch/arm/include/asm/arch-omap3/omap.h b/arch/arm/include/asm/arch-omap3/omap.h
index 417ff89..91d73c2 100644
--- a/arch/arm/include/asm/arch-omap3/omap.h
+++ b/arch/arm/include/asm/arch-omap3/omap.h
@@ -230,6 +230,14 @@
 #define AM3517			0x1c00
 
 #define OMAP3730		0x0c00
+#define OMAP3725		0x4c00
+#define AM3715			0x1c00
+#define AM3703			0x5c00
+
+#define OMAP3730_1GHZ		0x0e00
+#define OMAP3725_1GHZ		0x4e00
+#define AM3715_1GHZ		0x1e00
+#define AM3703_1GHZ		0x5e00
 
 /*
  * ROM code API related flags