Cannot compile DKMS modules on Kernel 5.18

[MicheleDG]

On Linux host with last 5.18 kernel it is impossible to compile dkms modules. Command /sbin/vboxconfig (vboxdrv.sh) gives this error while compiling:

/tmp/vbox.0/linux/VBoxNetFlt-linux.c:2314:23: error: implicit declaration of function ‘netif_rx_ni’; did you mean ‘netif_rx’? [-Werror=implicit-function-declaration]

2314 | err = netif_rx_ni(pBuf);

| ^{| netif_rx}

Tested on Ubuntu Linux 20.04 with kernel 5.18.1->5.18.3. Works flawless with kernel 5.17.x.

[galitsyn]

Please refer to #20914.