Blackfin: add support for the DBGA (debug assert) pseudo insn

A few pseudo debug insns exist to make testing of simulators easier.
Since these don't actually exist in the hardware, we have to have the
exception handler take care of emulating these.  This allows sim test
cases to be executed unmodified under Linux and thus simplify debugging
greatly.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/Kconfig.debug

@@ -264,4 +264,13 @@ config BFIN_ISRAM_SELF_TEST
 	help
 	  Run some self tests of the isram driver code at boot.
 
+config BFIN_PSEUDODBG_INSNS
+	bool "Support pseudo debug instructions"
+	default n
+	help
+	  This option allows the kernel to emulate some pseudo instructions which
+	  allow simulator test cases to be run under Linux with no changes.
+
+	  Most people should say N here.
+
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