skb: do not use full vfs for SKB.
skb: do not use full vfs for SKB.

using full VFS makes the SKB depend on megaraid which is not
available on other platforms than x86.

Signed-off-by: Reto Achermann <66f6ea3e040423755b3cf26edfe6c7fb1f9adc27@inf.ethz.ch>

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