clk: ux500: fix a possible off-by-one in u8500_prcc_reset_base()

Off-by-one will happen when index == ARRAY_SIZE(ur->base).

Fixes: b14cbdf ("clk: ux500: Add driver for the reset portions of PRCC")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220518062537.17933-1-hbh25y@gmail.com
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: HBh25Y

drivers/clk/ux500/reset-prcc.c

@@ -58,7 +58,7 @@ static void __iomem *u8500_prcc_reset_base(struct u8500_prcc_reset *ur,
 	prcc_num = id / PRCC_PERIPHS_PER_CLUSTER;
 	index = prcc_num_to_index(prcc_num);
 
-	if (index > ARRAY_SIZE(ur->base))
+	if (index >= ARRAY_SIZE(ur->base))
 		return NULL;
 
 	return ur->base[index];