[PATCH v2 3/5] rtw88: wow: build wow function only if CONFIG_PM is on

The kernel test robot reports undefined reference after we report wakeup
reason to mac80211. This is because CONFIG_PM is not defined in the testing
configuration file. In fact, functions within wow.c are used if CONFIG_PM
is defined, so use CONFIG_PM to decide whether we build this file or not.

The reported messages are:
   hppa-linux-ld: drivers/net/wireless/realtek/rtw88/wow.o: in function `rtw_wow_show_wakeup_reason':

quoted

(.text+0x6c4): undefined reference to `ieee80211_report_wowlan_wakeup'
hppa-linux-ld: (.text+0x6e0): undefined reference to `ieee80211_report_wowlan_wakeup'

Reported-by: kernel test robot <redacted>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw88/Makefile b/drivers/net/wireless/realtek/rtw88/Makefile
index c0e4b111c8b4..73d6807a8cdf 100644
--- a/drivers/net/wireless/realtek/rtw88/Makefile
+++ b/drivers/net/wireless/realtek/rtw88/Makefile

@@ -15,9 +15,9 @@ rtw88_core-y += main.o \
 	   ps.o \
 	   sec.o \
 	   bf.o \
-	   wow.o \
 	   regd.o
 
+rtw88_core-$(CONFIG_PM) += wow.o
 
 obj-$(CONFIG_RTW88_8822B)	+= rtw88_8822b.o
 rtw88_8822b-objs		:= rtw8822b.o rtw8822b_table.o

-- 
2.25.1