hwmon: (pmbus/ibm-cffps) fix Wvoid-pointer-to-enum-cast warning

'vs' is an enum, thus cast of pointer on 64-bit compile test with W=1
causes:

  ibm-cffps.c:492:8: error: cast to smaller integer type 'enum versions' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230810093157.94244-12-krzysztof.kozlowski@linaro.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: krzk

drivers/hwmon/pmbus/ibm-cffps.c

@@ -489,7 +489,7 @@ static int ibm_cffps_probe(struct i2c_client *client)
 	const struct i2c_device_id *id;
 
 	if (md) {
-		vs = (enum versions)md;
+		vs = (uintptr_t)md;
 	} else {
 		id = i2c_match_id(ibm_cffps_id, client);
 		if (id)