Blackfin arch: Move all the silicon rev handling to one place

Move all the silicon rev handling to one place (Kconfig) and
make sure we warn if you are running on silicon that has not been tested on

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index e9054e0..4267523 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -821,9 +821,10 @@
 			printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
 			       bfin_compiled_revid(), bfin_revid());
 	}
-	if (bfin_revid() < SUPPORTED_REVID)
+	if (bfin_revid() <= CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX)
 		printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
 		       CPU, bfin_revid());
+
 	printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 
 	printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",