mwifiex: fix wrong data rates in P2P client

commit 237b2ac8ac89a6b0120decdd05c7bf4637deb98a upstream.

This patch fixes an issue wherein adhoc rates were being copied
into association request from P2P client.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Stone Piao <piaoyun@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>