davinci: cleanup: move dm355 UART2 define to dm355.c

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 78fc598..893d5ba 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -34,6 +34,8 @@
 #include "clock.h"
 #include "mux.h"
 
+#define DM355_UART2_BASE	(IO_PHYS + 0x206000)
+
 /*
  * Device specific clocks
  */