staging: r8188eu: use native wireless IE codes from linux/ieee80211.h

IE code definitions have been replaced with native ones
to avoid code duplication.

The unobvious substitutions are:
_SSN_IE_1_ -> WLAN_EID_VENDOR_SPECIFIC;
_WPA_IE_ID_ -> WLAN_EID_VENDOR_SPECIFIC;
_WPA2_IE_ID_ -> WLAN_EID_RSN.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Link: https://lore.kernel.org/r/20201011105050.5896-1-insafonov@gmail.com


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