Buildroot commit [1] "kvmtool: bump to f77d646ba0" removed the
definition of KVMTOOL_EXTRA_LDFLAGS but forgot to remove its usage
in KVMTOOL_MAKE_OPTS.
This commit removes it since it is no longer needed.
[1] f20615b53e
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 443307ef50e0a5b14b095178b7c8d59ad3639ab4)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>