rt2x00: rt2800: fix zeroing skb structure
rt2x00: rt2800: fix zeroing skb structure

We should clear skb->data not skb itself. Bug was introduced by:
commit 0b8004aa12d13ec750d102ba4082a95f0107c649 "rt2x00: Properly
reserve room for descriptors in skbs".

Cc: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@kernel.org # 2.6.36+
Signed-off-by: Stanislaw Gruszka <1542dc81552e668e197a396f69e655c1621c300d@redhat.com>
Acked-by: Gertjan van Wingerde <1a7d4b7fcc67848a7146b426400f699af933a40d@gmail.com>
Acked-by: Ivo van Doorn <eb95d5f7a69eb0f8d26a960fe33483acdf581277@gmail.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs