staging: wlags49_h2: wl_priv: fixes incorrect #include

This commit forces the file to use <linux/uaccess.h> instead of
<asm/uaccess.h>. Everything still compiles a-OK.

Signed-off-by: Johan Meiring <johanmeiring@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>