Kernel: T8879: add missing Hyper-V drivers after 6.18 upgrade

Add drivers for Hyper-V hypervisor which got lost in transition from 6.6 to
6.18 Kernel upgrade.

Author: c-po

scripts/package-build/linux-kernel/config/x86/vyos_defconfig

@@ -976,6 +976,7 @@ CONFIG_SKB_EXTENSIONS=y
 # CONFIG_BATMAN_ADV is not set
 # CONFIG_OPENVSWITCH is not set
 CONFIG_VMWARE_VMCI_VSOCKETS=m
+CONFIG_HYPERV_VSOCKETS=m
 # CONFIG_QRTR is not set
 # CONFIG_NET_NCSI is not set
 
@@ -1374,6 +1375,7 @@ CONFIG_SCSI_BUSLOGIC=m
 # CONFIG_SCSI_MYRS is not set
 CONFIG_VMWARE_PVSCSI=m
 CONFIG_XEN_SCSI_FRONTEND=m
+CONFIG_HYPERV_STORAGE=m
 CONFIG_LIBFC=m
 CONFIG_LIBFCOE=m
 CONFIG_FCOE=m
@@ -2208,6 +2210,7 @@ CONFIG_VMXNET3=m
 CONFIG_USB4_NET=m
 # CONFIG_NETDEVSIM is not set
 CONFIG_NET_FAILOVER=m
+CONFIG_HYPERV_NET=m
 # CONFIG_ISDN is not set
 
 #
@@ -2311,6 +2314,7 @@ CONFIG_SERIO_LIBPS2=y
 # CONFIG_SERIO_ALTERA_PS2 is not set
 # CONFIG_SERIO_PS2MULT is not set
 # CONFIG_SERIO_ARC_PS2 is not set
+CONFIG_HYPERV_KEYBOARD=m
 # CONFIG_SERIO_GPIO_PS2 is not set
 # CONFIG_USERIO is not set
 # CONFIG_GAMEPORT is not set
@@ -4103,6 +4107,16 @@ CONFIG_VHOST_VSOCK=m
 CONFIG_VHOST_VDPA=m
 # CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
 
+# Microsoft Hyper-V guest support
+#
+CONFIG_HYPERV=y
+CONFIG_HYPERV_VTL_MODE=y
+CONFIG_HYPERV_TIMER=y
+CONFIG_HYPERV_UTILS=m
+CONFIG_HYPERV_BALLOON=m
+CONFIG_HYPERV_VMBUS=m
+# end of Microsoft Hyper-V guest support
+
 #
 # Xen driver support
 #
@@ -4249,6 +4263,7 @@ CONFIG_INTEL_IOMMU_SVM=y
 CONFIG_INTEL_IOMMU_PERF_EVENTS=y
 # CONFIG_IOMMUFD is not set
 CONFIG_IRQ_REMAP=y
+CONFIG_HYPERV_IOMMU=y
 CONFIG_VIRTIO_IOMMU=y
 
 #