V4L/DVB (7100): frontends/tda18271-common.c: fix off-by-one

This patch fixes an off-by-one error spotted by the Coverity checker.
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Reviewed-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/frontends/tda18271-common.c

@@ -171,7 +171,7 @@ int tda18271_read_extended(struct dvb_frontend *fe)
 	if (ret != 2)
 		tda_err("ERROR: i2c_transfer returned: %d\n", ret);
 
-	for (i = 0; i <= TDA18271_NUM_REGS; i++) {
+	for (i = 0; i < TDA18271_NUM_REGS; i++) {
 		/* don't update write-only registers */
 		if ((i != R_EB9)  &&
 		    (i != R_EB16) &&