kbuild: Move depmod call to a separate script

Do not bloat the Makefile with multiline shell statements. No
user-visible change intended.

Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/Makefile b/Makefile
index 60d4a67..4350937 100644
--- a/Makefile
+++ b/Makefile
@@ -1110,11 +1110,6 @@
 
 PHONY += _modinst_
 _modinst_:
-	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
-		echo "Warning: you may need to install module-init-tools"; \
-		echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
-		sleep 1; \
-	fi
 	@rm -rf $(MODLIB)/kernel
 	@rm -f $(MODLIB)/source
 	@mkdir -p $(MODLIB)/kernel
@@ -1531,12 +1526,7 @@
 
 # Run depmod only if we have System.map and depmod is executable
 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
-      cmd_depmod = \
-	if [ -r System.map -a -x $(DEPMOD) ]; then                              \
-		$(DEPMOD) -ae -F System.map                                     \
-		$(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
-		$(KERNELRELEASE);                                               \
-	fi
+      cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE)
 
 # Create temporary dir for module support files
 # clean it up only when building all modules