ssb: return boolean instead of integer in ssb_dma_translation_special_bit

Return statements in functions returning bool should use
true/false instead of 1/0.

This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/ssb/main.c

@@ -1116,7 +1116,7 @@ static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
 			chip_id == 43231 || chip_id == 43222);
 	}
 
-	return 0;
+	return false;
 }
 
 u32 ssb_dma_translation(struct ssb_device *dev)