virt: tegra: port vcpu yield to oot kernel

add support for tegra_hv_vcpu_yield driver in oot kernel

JIRA ESLC-7041

Change-Id: I29b60ab141fb98be62614062ebf7a4214b812c87
Signed-off-by: Suresh Venkatachalam <skathirampat@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2810680
Reviewed-by: Manish Bhardwaj <mbhardwaj@nvidia.com>
Reviewed-by: Bharath H S <bhs@nvidia.com>
Reviewed-by: Sandeep Trasi <strasi@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

include/uapi/linux/tegra_hv_vcpu_yield_ioctl.h

@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note)
+ *
+ * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef _UAPI_TEGRA_HV_VCPU_YIELD_IOCTL_H_
+#define _UAPI_TEGRA_EPL_H_
+
+#include <linux/ioctl.h>
+
+#define VCPU_YIELD_IOC_MAGIC    'Y'
+#define VCPU_YIELD_START_CMDID  1
+
+/* Control data for VCPU Yield Start ioctl */
+struct vcpu_yield_start_ctl {
+	/* max time in micro seconds for which vcpu will be yielded */
+	uint32_t timeout_us;
+};
+
+#define VCPU_YIELD_START_IOCTL _IOW(VCPU_YIELD_IOC_MAGIC, \
+		VCPU_YIELD_START_CMDID, struct vcpu_yield_start_ctl)
+
+#endif /* #ifndef _UAPI_TEGRA_HV_VCPU_YIELD_IOCTL_H_ */