HID: logitech-hidpp: Simplify array length check

Use the compiler to force a 100-length array, rather than check the
length after the fact.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20230302105555.51417-1-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

Author: hadess

drivers/hid/hid-logitech-hidpp.c

@@ -1404,7 +1404,7 @@ static int hidpp20_map_battery_capacity(struct hid_device *hid_dev, int voltage)
 	 * there are a few devices that use different battery technology.
 	 */
 
-	static const int voltages[] = {
+	static const int voltages[100] = {
 		4186, 4156, 4143, 4133, 4122, 4113, 4103, 4094, 4086, 4075,
 		4067, 4059, 4051, 4043, 4035, 4027, 4019, 4011, 4003, 3997,
 		3989, 3983, 3976, 3969, 3961, 3955, 3949, 3942, 3935, 3929,
@@ -1419,8 +1419,6 @@ static int hidpp20_map_battery_capacity(struct hid_device *hid_dev, int voltage)
 
 	int i;
 
-	BUILD_BUG_ON(ARRAY_SIZE(voltages) != 100);
-
 	if (unlikely(voltage < 3500 || voltage >= 5000))
 		hid_warn_once(hid_dev,
 			      "%s: possibly using the wrong voltage curve\n",