ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit

Add suffix ULL to constant 500 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
u64 (64 bits, unsigned).

The expression NUM_RETRIES * cppc_ss->latency at line 578, which at
preprocessing time translates to 500 * cppc_ss->latency is currently
being evaluated using 32-bit arithmetic.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/cppc_acpi.c

@@ -119,7 +119,7 @@ static DEFINE_PER_CPU(struct cpc_desc *, cpc_desc_ptr);
  * to PCC commands. Keeping it high enough to cover emulators where
  * the processors run painfully slow.
  */
-#define NUM_RETRIES 500
+#define NUM_RETRIES 500ULL
 
 struct cppc_attr {
 	struct attribute attr;