package/rtl8189fs: fix build with big endian

Add local patch to allow to override CFLAGS and undefine
CONFIG_LITTLE_ENDIAN by default and use the correct endianness according
to target architecture.

Fixes:
http://autobuild.buildroot.net/results/fe67db3884573ef750eda9d0dccd5f97b3ae698e

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/rtl8189fs/0001-Makefile-move-EXTRA_CFLAGS-USER_EXTRA_CFLAGS-at-the-.patch

@@ -0,0 +1,41 @@
+From f48d99fab8b79e573850067a3ff2d8c16aa95ce1 Mon Sep 17 00:00:00 2001
+From: Giulio Benetti <giulio.benetti@benettiengineering.com>
+Date: Wed, 28 Sep 2022 21:17:17 +0200
+Subject: [PATCH] Makefile: move 'EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)' at the
+ end of EXTRA_FLAGS assignment
+
+At the moment USER_EXTRA_CFLAGS can't override local Makfile EXTRA_CFLAGS
+since it's assigned at the beginning of the Makefile. For example it's not
+possible to undefine the hardcoded CONFIG_LITTLE_ENDIAN and this doesn't
+allow to build these modules for big endian architectures. So let's move
+the assignment of USER_EXTRA_CFLAGS to EXTRA_CFLAGS after the last
+EXTRA_CFLAGS assignment.
+
+Upstream: https://github.com/jwrdegoede/rtl8189ES_linux/pull/101
+
+Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
+---
+ Makefile | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index dfca305..6f91d0a 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,4 +1,3 @@
+-EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)
+ EXTRA_CFLAGS += -O1
+ #EXTRA_CFLAGS += -O3
+ #EXTRA_CFLAGS += -Wall
+@@ -2208,6 +2207,8 @@ ifneq ($(USER_MODULE_NAME),)
+ MODULE_NAME := $(USER_MODULE_NAME)
+ endif
+ 
++EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)
++
+ ifneq ($(KERNELRELEASE),)
+ 
+ ########### this part for *.mk ############################
+-- 
+2.34.1
+

package/rtl8189fs/rtl8189fs.mk

@@ -8,10 +8,15 @@ RTL8189FS_VERSION = 75a566a830037c7d1309c5a9fe411562772a1cf2
 RTL8189FS_SITE = $(call github,jwrdegoede,rtl8189ES_linux,$(RTL8189FS_VERSION))
 RTL8189FS_LICENSE = GPL-2.0
 
+RTL8189FS_USER_EXTRA_CFLAGS = \
+	-UCONFIG_LITTLE_ENDIAN \
+	-DCONFIG_$(call qstrip,$(BR2_ENDIAN))_ENDIAN
+
 RTL8189FS_MODULE_MAKE_OPTS = \
 	CONFIG_RTL8189FS=m \
 	KVER=$(LINUX_VERSION_PROBED) \
-	KSRC=$(LINUX_DIR)
+	KSRC=$(LINUX_DIR) \
+	USER_EXTRA_CFLAGS="$(RTL8189FS_USER_EXTRA_CFLAGS)"
 
 ifeq ($(BR2_ENABLE_RUNTIME_DEBUG),)
 RTL8189FS_MODULE_MAKE_OPTS += CONFIG_RTW_DEBUG=n