Actually the former code was being expanding
uname_M variable which is not set that early
(this was not a problem since we assign it a
line below, still it was a dead code which
should be fixed).

Also update

 | ifeq ($(findstring arm,$(ARCH)),arm)

to simple

 | ifeq ($(ARCH),arm)
Reported-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>