[POWERPC] Clean up duplicate includes in drivers/macintosh/

Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

drivers/macintosh/rack-meter.c

@@ -30,7 +30,6 @@
 #include <asm/machdep.h>
 #include <asm/pmac_feature.h>
 #include <asm/dbdma.h>
-#include <asm/dbdma.h>
 #include <asm/macio.h>
 #include <asm/keylargo.h>