techpack: Replace xtype with type while searching for sub-dirs

Some build environments do not support -xtype. Therefore
use -type instead.

Change-Id: I459bdd9e16dc31ea0b91d5f0cb86d4dabb1e3352
Signed-off-by: Bruce Levy <[email protected]>

techpack/Kbuild

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
 TECHPACK?=y
 
-techpack-dirs := $(shell find $(srctree)/techpack -maxdepth 1 -mindepth 1 -xtype d -not -name ".*")
+techpack-dirs := $(shell find $(srctree)/techpack -maxdepth 1 -mindepth 1 -type d -not -name ".*")
 obj-${TECHPACK} += stub/ $(addsuffix /,$(subst $(srctree)/techpack/,,$(techpack-dirs)))