include/kernel.mk: flag kmod packages as nonshared by default

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

include/kernel.mk

@@ -155,6 +155,7 @@ define KernelPackage
     DESCRIPTION:=$(DESCRIPTION)
     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
+    PKG_FLAGS:=nonshared
     $(call KernelPackage/$(1))
     $(call KernelPackage/$(1)/$(BOARD))
   endef