utils/tar: Fix defaulting to selecting dependencies

Due to KConfig misbehavior the tar config options where getting
enabled even when tar was not enabled.  We fix this by enclosing
the options in an if PACKAGE_tar ; endif block.

Signed-off-by: Daniel Dickinson <lede@daniel.thecshore.com>

utils/tar/Makefile

@@ -36,27 +36,29 @@ define Package/tar
 endef
 
 define Package/tar/config
-	config PACKAGE_TAR_POSIX_ACL
-	bool "tar: Enable POSIX ACL support" if PACKAGE_tar
-	default n
-
-	config PACKAGE_TAR_XATTR
-	bool "tar: Enable extended attribute (xattr) support" if PACKAGE_tar
-	default n
-
-	config PACKAGE_TAR_GZIP
-	bool "tar: Enable seamless gzip support" if PACKAGE_tar
-	default y
-
-	config PACKAGE_TAR_BZIP2
-	bool "tar: Enable seamless bzip2 support" if PACKAGE_tar
-	default y
-
-	config PACKAGE_TAR_XZ
-	bool "tar: Enable seamless xz support" if PACKAGE_tar
-	select PACKAGE_xz-utils
-	select PACKAGE_xz
-	default y
+	if PACKAGE_tar
+		config PACKAGE_TAR_POSIX_ACL
+			bool "tar: Enable POSIX ACL support"
+			default n
+
+		config PACKAGE_TAR_XATTR
+			bool "tar: Enable extended attribute (xattr) support"
+			default n
+
+		config PACKAGE_TAR_GZIP
+			bool "tar: Enable seamless gzip support"
+			default y
+
+		config PACKAGE_TAR_BZIP2
+			bool "tar: Enable seamless bzip2 support"
+			default y
+
+		config PACKAGE_TAR_XZ
+			bool "tar: Enable seamless xz support"
+			select PACKAGE_xz-utils
+			select PACKAGE_xz
+			default y
+	endif
 endef
 
 define Package/tar/description