davinci_rev() should work from modules too

Export davinci_rev() so that users of <mach/cpu.h> CPU test code
don't need to be statically linked.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/id.c

@@ -83,6 +83,7 @@ unsigned int davinci_rev(void)
 {
 	return davinci_revision >> 16;
 }
+EXPORT_SYMBOL(davinci_rev);
 
 void __init davinci_check_revision(void)
 {