AT91: factor out ROUND() macro

A large number of boards (all AT91 based) duplicated the ROUND()
macro in their board specific config files. Add the definition to
include/common.h and clean up the board config files.

Signed-off-by: Wolfgang Denk <wd@denx.de>

include/common.h

@@ -697,6 +697,7 @@ void show_boot_progress(int val);
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
+#define ROUND(a,b)		(((a) + (b)) & ~((b) - 1))
 #define DIV_ROUND(n,d)		(((n) + ((d)/2)) / (d))
 #define DIV_ROUND_UP(n,d)	(((n) + (d) - 1) / (d))
 #define roundup(x, y)		((((x) + ((y) - 1)) / (y)) * (y))