vmxnet3: must split too big fragments

vmxnet3: must split too big fragments

vmxnet3 has a 16Kbytes limit per tx descriptor, that happened to work
as long as we provided PAGE_SIZE fragments.

Our stack can now build larger fragments, so we need to split them to
the 16kbytes boundary.

Signed-off-by: Eric Dumazet <[email protected]>
Reported-by: jongman heo <[email protected]>
Tested-by: jongman heo <[email protected]>
Cc: Shreyas Bhatewara <[email protected]>
Reviewed-by: Bhavesh Davda <[email protected]>
Signed-off-by: Shreyas Bhatewara <[email protected]>
Signed-off-by: David S. Miller <[email protected]>