KVM: arm64: selftests: Data type cleanup for arch_timer test

Change signed type to unsigned in test_args struct which
only make sense for unsigned value.

Suggested-by: Andrew Jones <[e-mail]>
Signed-off-by: Haibo Xu <[e-mail]>
Reviewed-by: Andrew Jones <[e-mail]>
Reviewed-by: Marc Zyngier <[e-mail]>
Signed-off-by: Anup Patel <[e-mail]>

tools/testing/selftests/kvm/aarch64/arch_timer.c

···
 #define TIMER_TEST_MIGRATION_FREQ_MS	2
 
 struct test_args {
-	int nr_vcpus;
-	int nr_iter;
-	int timer_period_ms;
-	int migration_freq_ms;
+	uint32_t nr_vcpus;
+	uint32_t nr_iter;
+	uint32_t timer_period_ms;
+	uint32_t migration_freq_ms;
 	struct kvm_arm_counter_offset offset;
 };
 
···
 	.offset = { .reserved = 1 },
 };
 
-#define msecs_to_usecs(msec)		((msec) * 1000LL)
+#define msecs_to_usecs(msec)		((msec) * 1000ULL)
 
 #define GICD_BASE_GPA			0x8000000ULL
 #define GICR_BASE_GPA			0x80A0000ULL
···
 
 /* Shared variables between host and guest */
 struct test_vcpu_shared_data {
-	int nr_iter;
+	uint32_t nr_iter;
 	enum guest_stage guest_stage;
 	uint64_t xcnt;
 };