wil6210: fix memory leak on error path in wil_write_file_rxon()

If copy_from_user() fails, buffer allocated for parameters would leak

Change-Id: Iacebe3e0128c6a225c957fc66938856898d78d20
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Git-commit: 359ee6275368c6fc8c6143f706e1b0075a244070
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>