UPSTREAM: mwifiex: fix crash in SDIO RX path

With patch '960d6d08e39 "mwifiex: delay skb allocation for RX
until cmd53 over"' we no more pass skb parameter to MP aggregation setup
helper function. We instead pass length to be aggregated.

This patch fixes an issue where we were passing length parameter of NULL
skb to aggregation routine resulting into crash. We should instead pass
rx_len received from mp_regs.

BUG=chrome-os-partner:33858
TEST=Ran throughput test(iperf TX/RX) with all patches in this series applied,
     TP improvements seen around 25%. No Google autotest regressions.

Change-Id: I42e35d04221e72e9fe82f842bc1891b725780c7a
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Reviewed-on: https://chromium-review.googlesource.com/260775
Reviewed-by: Paul Stewart <pstew@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/261487
1 file changed