arc: Don't include asm/u-boot.h in common

This is not actually needed anywhere, so drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/common.h

@@ -444,9 +444,6 @@ static inline int setenv_addr(const char *varname, const void *addr)
 #ifdef CONFIG_MIPS
 # include <asm/u-boot.h>
 #endif /* CONFIG_MIPS */
-#ifdef CONFIG_ARC
-# include <asm/u-boot.h>
-#endif /* CONFIG_ARC */
 
 #ifdef CONFIG_AUTO_COMPLETE
 int env_complete(char *var, int maxv, char *cmdv[], int maxsz, char *buf);