staging: vt6655: power.c: Remove setting ATIM Window in PSvEnablePowerSaving()

Every time priv->op_mode is not NL80211_IFTYPE_ADHOC it sets ATIM Window, but
this feature it is marked TODO in 2014 and did go untouched since 2015.

Signed-off-by: Lourdes Pedrajas <lu@pplo.net>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Link: https://lore.kernel.org/r/d9b8e434e09cb8885026a71441bf3a6919dba3da.1583848946.git.lu@pplo.net


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>