staging: r8188eu: Fix build error with random configuration

The kbuild test robot reports the following error:

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   e4a745f9519ef2bbb9d75212ae1cca7582d76266
commit: b63c0539 [7011/7939] staging: r8188eu: Turn on build of new driver
config: x86_64-randconfig-x0-0828 (attached as .config)

All error/warnings:

   drivers/staging/rtl8188eu/core/rtw_p2p.c: In function 'go_add_group_info_attr':
>> drivers/staging/rtl8188eu/core/rtw_p2p.c:70:11: error: 'struct sta_info' has no member named 'is_p2p_device'
      if (psta->is_p2p_device) {

This and the following errors were caused by an incorrect nesting of
conditional compilation directives.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/sta_info.h

@@ -180,6 +180,7 @@ struct sta_info {
 
 	u8 has_legacy_ac;
 	unsigned int sleepq_ac_len;
+#endif	/*  CONFIG_88EU_AP_MODE */
 
 #ifdef CONFIG_88EU_P2P
 	/* p2p priv data */
@@ -198,7 +199,6 @@ struct sta_info {
 #endif /* CONFIG_88EU_P2P */
 	u8 under_exist_checking;
 	u8 keep_alive_trycnt;
-#endif	/*  CONFIG_88EU_AP_MODE */
 
 	/* for DM */
 	struct rssi_sta rssi_stat;