package/libnfs: allow parallel build

Tested with BR2_JLEVEL=100.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libnfs/libnfs.mk

@@ -8,7 +8,6 @@ LIBNFS_VERSION = libnfs-2.0.0
 LIBNFS_SITE = $(call github,sahlberg,libnfs,$(LIBNFS_VERSION))
 LIBNFS_INSTALL_STAGING = YES
 LIBNFS_AUTORECONF = YES
-LIBNFS_MAKE = $(MAKE1)
 LIBNFS_LICENSE = LGPL-2.1+
 LIBNFS_LICENSE_FILES = LICENCE-LGPL-2.1.txt
 LIBNFS_DEPENDENCIES = host-pkgconf