package/lmbench: use UPDATE_CONFIG_HOOK instead of CONFIG_UPDATE

jimtcl, perl, usb_modeswitch and x264 are registering
UPDATE_CONFIG_HOOK as a post patch hook to get their gnuconfig files
updated. lmbench is the only package calling CONFIG_UPDATE directly,
so for consistency, let's make it use the same logic as jimtcl, perl,
usb_modeswitch and x264.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/lmbench/lmbench.mk

@@ -18,8 +18,9 @@ LMBENCH_CFLAGS += `$(PKG_CONFIG_HOST_BINARY) --cflags libtirpc`
 LMBENCH_LDLIBS = `$(PKG_CONFIG_HOST_BINARY) --libs libtirpc`
 endif
 
+LMBENCH_POST_PATCH_HOOKS += UPDATE_CONFIG_HOOK
+
 define LMBENCH_CONFIGURE_CMDS
-	$(call CONFIG_UPDATE,$(@D))
 	sed -i 's/CFLAGS=/CFLAGS+=/g' $(@D)/src/Makefile
 	sed -i 's/LDLIBS=/LDLIBS+=/g' $(@D)/scripts/build
 	sed -i '/cd .*doc/d' $(@D)/src/Makefile