build: make TARGET_ROOTFS_JFFS2 depend on USES_JFFS2
authorFelix Fietkau <nbd@nbd.name>
Tue, 19 Jul 2016 10:21:29 +0000 (12:21 +0200)
committerFelix Fietkau <nbd@nbd.name>
Wed, 20 Jul 2016 08:13:50 +0000 (10:13 +0200)
If jffs2 support was not enabled by the target, jffs2 are quite likely
to be broken, so we shouldn't build them.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

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