This change introduces dynamic port breakout (DPB) for Arista 7050 QX32 model by adding a new SKU suffixed with `-Flex`.
The breakout configuration allowed is the same as in mainline Arista EOS, i.e. 24 first ports are allowed to be used in 4x10G in addition to the default 40G mode. The last 8 ports are fixed to 40G. This is due to ASIC limitations of a total of 104 max ports.
**NOTE**: As described in https://github.com/aristanetworks/sonic/issues/30#issuecomment-820584113 front panel LEDs are likely not working when operating in breakout mode. It is not clear if the LEDs work correctly in 40G mode as I have not had a chance to physically inspect the switch with this patch.
Signed-off-by: Christian Svensson <blue@cmd.nu>
186e1b9b57