Staging: wlags49_h2: Fix incorrect type in assignment in wl_wext.c

This patch fixes following sparse warnings:
drivers/staging/wlags49_h2/wl_wext.c:3357:28: warning: incorrect type in assignment (different address spaces)
drivers/staging/wlags49_h2/wl_wext.c:3357:28:    expected void [noderef] <asn:1>*[addressable] [assigned] pointer
drivers/staging/wlags49_h2/wl_wext.c:3357:28:    got void *<noident>
drivers/staging/wlags49_h2/wl_wext.c:3422:47: warning: incorrect type in assignment (different address spaces)
drivers/staging/wlags49_h2/wl_wext.c:3422:47:    expected void [noderef] <asn:1>*[addressable] [assigned] pointer
drivers/staging/wlags49_h2/wl_wext.c:3422:47:    got char *[usertype] <noident>
drivers/staging/wlags49_h2/wl_wext.c:3781:21: warning: symbol 'wl_priv_args' was not declared. Should it be static?

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>