spi: pic32-sqi: silence array overflow warning

We read one element beyond the end of the array when we access
"rdesc[i + 1]" so it causes a static checker warning.  It's harmless
because we write over it again on the next line.  But let's just silence
the warning.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NPurna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-pic32-sqi.c

@@ -537,7 +537,7 @@ static int ring_desc_ring_alloc(struct pic32_sqi *sqi)
 	}
 
 	/* Prepare BD: chain to next BD(s) */
-	for (i = 0, rdesc = sqi->ring; i < PESQI_BD_COUNT; i++)
+	for (i = 0, rdesc = sqi->ring; i < PESQI_BD_COUNT - 1; i++)
 		bd[i].bd_nextp = rdesc[i + 1].bd_dma;
 	bd[PESQI_BD_COUNT - 1].bd_nextp = 0;