media: i2c: max2175: use 64-bit arithmetic instead of 32-bit

Add suffix LL to constant 2 in order to give the compiler complete
information about the proper arithmetic to use. Notice that this
constant is used in a context that expects an expression of type
s64 (64 bits, signed).

The expression 2 * (clock_rate - abs_nco_freq) is currently being
evaluated using 32-bit arithmetic.

Addresses-Coverity-ID: 1446589 ("Unintentional integer overflow")
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/max2175.c

@@ -643,7 +643,7 @@ static int max2175_set_nco_freq(struct max2175 *ctx, s32 nco_freq)
 	if (abs_nco_freq < clock_rate / 2) {
 		nco_val_desired = 2 * nco_freq;
 	} else {
-		nco_val_desired = 2 * (clock_rate - abs_nco_freq);
+		nco_val_desired = 2LL * (clock_rate - abs_nco_freq);
 		if (nco_freq < 0)
 			nco_val_desired = -nco_val_desired;
 	}