Separate multicast filtering of SysKonnect GENESIS and Marvell
Yukon from common multicast handling code. Yukon uses hash-based
multicast filtering(big endian form) but GENESIS uses perfect
multicast filtering as well as hash-based one(little endian form).
Due to the differences of multicast filtering there is no much
sense to have a common code.
o Remove sk_setmulti() and introduce sk_rxfilter_yukon(),

sk_rxfilter_yukon() that handles multicast filtering setup.

o Have sk_rxfilter_{yukon, genesis} handle promiscuous mode and

nuke sk_setpromisc(). This simplifies ioctl handler as well as
giving a chance to check validity of Rx control register of
Yukon.

o Don't reinitialize controller when IFF_ALLMULTI flags is changed.
o Nuke sk_gmchash(), it's not needed anymore.
o Always reconfigure Rx control register whenever a new multicast

filtering condition is changed. This fixes multicast filtering
setup on Yukon.

PR: kern/134051