wifi: rtw88: Shared module for rtw8723x devices

The already supported 8723d chip is very similar to 8703b/8723cs,
split code that can be shared into a new module. The spec definition
tables are combined into a struct so we only need one EXPORT_SYMBOL
for them all.

Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Tested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Fiona Klute <fiona.klute@gmx.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240311103735.615541-2-fiona.klute@gmx.de

drivers/net/wireless/realtek/rtw88/Kconfig

@@ -28,8 +28,12 @@ config RTW88_8822B
 config RTW88_8822C
 	tristate
 
+config RTW88_8723X
+	tristate
+
 config RTW88_8723D
 	tristate
+	select RTW88_8723X
 
 config RTW88_8821C
 	tristate

drivers/net/wireless/realtek/rtw88/Makefile

@@ -44,6 +44,9 @@ rtw88_8822cs-objs		:= rtw8822cs.o
 obj-$(CONFIG_RTW88_8822CU)	+= rtw88_8822cu.o
 rtw88_8822cu-objs		:= rtw8822cu.o
 
+obj-$(CONFIG_RTW88_8723X)	+= rtw88_8723x.o
+rtw88_8723x-objs		:= rtw8723x.o
+
 obj-$(CONFIG_RTW88_8723D)	+= rtw88_8723d.o
 rtw88_8723d-objs		:= rtw8723d.o rtw8723d_table.o