kbuild: Enable dtc 'pci_device_reg' warning by default

There's only a couple of instances of the 'pci_device_reg' warnings left
and they look legit, so let's enable the warning by default.

Cc: Heiko Stuebner <[email protected]>
Cc: Nicolas Saenz Julienne <[email protected]>
Cc: [email protected]
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/

Author: robherring

scripts/Makefile.lib

@@ -309,8 +309,7 @@ DTC_FLAGS += -Wno-unit_address_vs_reg \
 	-Wno-alias_paths \
 	-Wno-graph_child_address \
 	-Wno-simple_bus_reg \
-	-Wno-unique_unit_address \
-	-Wno-pci_device_reg
+	-Wno-unique_unit_address
 endif
 
 ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)