package/libopenssl: update configure option for libatomic

Without this patch openssl adds -latomic twice to Libs.private in
libcrypto.pc:

cat output/per-package/opensc/host/arceb-buildroot-linux-uclibc/sysroot/usr/lib/pkgconfig/libcrypto.pc | grep atomic
Libs.private: -ldl -pthread -latomic -latomic

Instead of passing -latomic to Configure we use the target arch
"linux-latomic" which is provided by upstream since version 3.0.0
especially for libatomic handling:
https://github.com/openssl/openssl/commit/535130c39d33df41b6a7d14302a93ffaa10ebc46
https://github.com/openssl/openssl/commit/cdf2986a70d92668d882eb29737225f1aaafd0f1

To be noted: the build still fails for both bootlin-armv7m-uclibc and
bootlin-m68k-5208-uclibc, but this is not a regression due to this
patch, and is tracked as #15709.

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libopenssl/Config.in

@@ -26,6 +26,7 @@ config BR2_PACKAGE_LIBOPENSSL_TARGET_ARCH
 	# linux-generic{32,64}, see
 	# https://github.com/openssl/openssl/issues/9839
 	default "linux-generic64 no-asm"	if BR2_ARCH_IS_64 && !BR2_MIPS_NABI32
+	default "linux-latomic no-asm"		if BR2_TOOLCHAIN_HAS_LIBATOMIC
 	default "linux-generic32 no-asm"
 
 config BR2_PACKAGE_LIBOPENSSL_BIN

package/libopenssl/libopenssl.mk

@@ -73,7 +73,6 @@ define LIBOPENSSL_CONFIGURE_CMDS
 			$(LIBOPENSSL_TARGET_ARCH) \
 			--prefix=/usr \
 			--openssldir=/etc/ssl \
-			$(if $(BR2_TOOLCHAIN_HAS_LIBATOMIC),-latomic) \
 			$(if $(BR2_TOOLCHAIN_HAS_THREADS),threads,no-threads) \
 			$(if $(BR2_STATIC_LIBS),no-shared,shared) \
 			$(if $(BR2_PACKAGE_CRYPTODEV_LINUX),enable-devcryptoeng) \