Revert "package/iptables: nfsynproxy not available on musl"

This reverts commit 497f15b301273cd81e54b4fcc5da6ab90e27796c.

As the comment says, musl version 1.1.13 contains commit 53f41fb568ae4.
Buildroot now ships musl version 1.1.16, so enable build with musl.

Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/iptables/Config.in

@@ -9,10 +9,6 @@ if BR2_PACKAGE_IPTABLES
 
 config BR2_PACKAGE_IPTABLES_BPF_NFSYNPROXY
 	bool "bpfc and nfsynproxy"
-	# this dependency can be removed when using a musl version
-	# containing this commit:
-	# http://git.musl-libc.org/cgit/musl/commit/?id=53f41fb568ae43034c9876cc9bd3961fd6d13671
-	depends on !BR2_TOOLCHAIN_USES_MUSL
 	select BR2_PACKAGE_LIBPCAP
 	help
 	  Build bpf compiler and nfsynproxy configuration tool.