package/iwd: remove numbering from patch

check-package says
package/iwd/0001-dpp-fix-implicit-declaration-of-function-explicit_bz.patch:4: generate your patches with 'git format-patch -N'

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/iwd/0001-dpp-fix-implicit-declaration-of-function-explicit_bz.patch

@@ -1,7 +1,7 @@
 From 6ce41f621154eff0145dab41308bc145c0440f16 Mon Sep 17 00:00:00 2001
 From: Peter Seiderer <ps.report@gmx.net>
 Date: Mon, 10 Jan 2022 22:32:18 +0100
-Subject: [PATCH 1/1] dpp: fix implicit declaration of function explicit_bzero
+Subject: [PATCH] dpp: fix implicit declaration of function explicit_bzero
  warning
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