package/lvm2: default standard install to y

package/lvm2: default standard install to y

Until commit 5c07dfcc1a52e2804011574a3e022523a20546c8
BR2_PACKAGE_LVM2_STANDARD_INSTALL would default to y. Indeed, the
default read:

      default y if !BR2_PACKAGE_LVM2_DMSETUP_ONLY # legacy 2013.11

Since the legacy symbol is normally not selected, this defaults to y.

Commit 5c07dfcc1a52e2804011574a3e022523a20546c8 inadvertedly removed the
entire line instead of just the condition.

Fixes: https://bugs.busybox.net/show_bug.cgi?id=13846
For-stable: 2021.02, 2021.05
Cc: dominique.tronche@atos.net
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>