While we always mask the revision with 0x7c800000 linux uses a table

While we always mask the revision with 0x7c800000 linux uses a table
that masks with either 0x7c800000 or 0x7cf00000 depending on the chip.

Some of the hardware revisions I previously added can't be matched with
the current mask, these are already handled by other revision defines
so remove them.

When masking the revision defines with 0x7c800000:

RL_HWREV_8106E_SPIN1 is the same as RL_HWREV_8106E
RL_HWREV_8168G_SPIN1 is the same as RL_HWREV_8168G
RL_HWREV_8168G_SPIN2 is the same as RL_HWREV_8168GU