wifi: rtl8xxxu: Enable AP mode for RTL8710BU (RTL8188GU)

Theoretically this chip can handle 15 clients.

Tested only very briefly but it should work as well as the RTL8188FU.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/ce04a0a1-df72-ea30-f742-8834e01457f5@gmail.com

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8710b.c

@@ -1875,6 +1875,8 @@ struct rtl8xxxu_fileops rtl8710bu_fops = {
 	 */
 	.ustime_tsf_edca = 0x28,
 	.max_aggr_num = 0x0c14,
+	.supports_ap = 1,
+	.max_macid_num = 16,
 	.adda_1t_init = 0x03c00016,
 	.adda_1t_path_on = 0x03c00016,
 	.trxff_boundary = 0x3f7f,