armv7m: use generic arm::core_mode

To simplify things change over to using the generic core_mode struct rather
than maintaining a armv7m specific one.

Change-Id: Ibf32b785d896fef4f33307fabe0d8eb266f7086f
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/966
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>

src/target/armv4_5.c

@@ -140,6 +140,21 @@ static const struct {
 		.n_indices = ARRAY_SIZE(arm_mon_indices),
 		.indices = arm_mon_indices,
 	},
+
+	/* These special modes are currently only supported
+	 * by ARMv6M and ARMv7M profiles */
+	{
+		.name = "Thread",
+		.psr = ARM_MODE_THREAD,
+	},
+	{
+		.name = "Thread (User)",
+		.psr = ARM_MODE_USER_THREAD,
+	},
+	{
+		.name = "Handler",
+		.psr = ARM_MODE_HANDLER,
+	},
 };
 
 /** Map PSR mode bits to the name of an ARM processor operating mode. */