iwlwifi: compile in ACPI support

Now that LinuxKPI supports the lower case Linux ACPI spellings under
LINUXKPI_WANT_LINUX_ACPI we only need to provide the debug macro to
allow us to compile in ACPI support.

This ties into regulatory and will be used, e.g., for 11ax, 11be,
and Per Platform Antenna Gain (PPAG) settings.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days

sys/contrib/dev/iwlwifi/iwl-debug.h

@@ -47,7 +47,7 @@ enum iwl_dl {
 	IWL_DL_DROP		= 0x00000010,
 	IWL_DL_EEPROM		= 0x00000020,
 	IWL_DL_FW		= 0x00000040,
-	/*			= 0x00000080, */
+	IWL_DL_DEV_RADIO	= 0x00000080,
 	IWL_DL_HC		= 0x00000100,
 	IWL_DL_HT		= 0x00000200,
 	IWL_DL_INFO		= 0x00000400,
@@ -195,6 +195,8 @@ void __iwl_dbg(struct device *, u32, bool, const char *, const char *fmt, ...);
 	IWL_DPRINTF(_subsys, IWL_DL_WEP, _fmt, ##__VA_ARGS__)
 #define	IWL_DEBUG_WOWLAN(_subsys, _fmt, ...)				\
 	IWL_DPRINTF(_subsys, IWL_DL_WOWLAN, _fmt, ##__VA_ARGS__)
+#define	IWL_DEBUG_DEV_RADIO(_dev, _fmt, ...)				\
+	IWL_DPRINTF_DEV((_dev), IWL_DL_DEV_RADIO, _fmt, ##__VA_ARGS__)
 
 #define	IWL_DEBUG_PCI_RW(_subsys, _fmt, ...)				\
 	IWL_DPRINTF(_subsys, IWL_DL_PCI_RW, _fmt, ##__VA_ARGS__)

sys/modules/iwlwifi/Makefile

@@ -4,6 +4,7 @@ DEVIWLWIFIDIR=	${SRCTOP}/sys/contrib/dev/iwlwifi
 
 WITH_CONFIG_PM=	0
 WITH_DEBUGFS=	1
+WITH_CONFIG_ACPI=	1
 
 KMOD=	if_iwlwifi
 
@@ -40,6 +41,12 @@ CFLAGS+=	-DCONFIG_PM
 CFLAGS+=	-DCONFIG_PM_SLEEP
 .endif
 
+.if defined(WITH_CONFIG_ACPI) && ${WITH_CONFIG_ACPI} > 0
+SRCS+=	fw/acpi.c
+CFLAGS+=	-DCONFIG_ACPI
+CFLAGS+=	-DLINUXKPI_WANT_LINUX_ACPI
+.endif
+
 SRCS+=	iwl-devtrace.c
 
 # Other
@@ -56,7 +63,6 @@ CFLAGS+=	-DCONFIG_IWLMVM=1
 # Helpful after fresh imports.
 #CFLAGS+=	-ferror-limit=0
 
-#CFLAGS+=	-DCONFIG_ACPI=1
 #CFLAGS+=	-DCONFIG_INET=1		# Need LKPI TSO implementation.
 #CFLAGS+=	-DCONFIG_IPV6=1
 CFLAGS+=	-DCONFIG_IWLWIFI_DEBUG=1