package/pkg-kconfig.mk: fix typo in comment

Signed-off-by: Marcus Hoffmann <m.hoffmann@cartelsol.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/pkg-kconfig.mk

@@ -189,7 +189,7 @@ $$($(2)_DIR)/.kconfig_editor_%: $$($(2)_DIR)/.stamp_kconfig_fixup_done
 # which in turn depends on the (newly-set an non-existent) custom
 # defconfig file.
 #
-# Instead, we use an PHONY rule that will catch that situation.
+# Instead, we use a PHONY rule that will catch that situation.
 #
 $(1)-check-configuration-done:
 	@if [ ! -f $$($(2)_DIR)/.stamp_kconfig_fixup_done ]; then \