gnu: ath9k-htc-firmware: Adjust Binutils patch to 2.28.

* gnu/packages/patches/ath9k-htc-firmware-binutils.patch: Remove last
hunk, which is now in Binutils 2.28.

gnu/packages/patches/ath9k-htc-firmware-binutils.patch

@@ -5,9 +5,6 @@ Not applying the first patch (apparently) leads to miscompiled firmware,
 and loading it fails with a "Target is unresponsive" message from the
 'ath9k_htc' module.
 
-The final hunk, applied to 'gas/config/tc-xtensa.c', is copied from the
-upstream file 'local/patches/binutils-2.27_fixup.patch'.
-
 From dbca73446265ce01b8e11462c3346b25953e3399 Mon Sep 17 00:00:00 2001
 From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
 Date: Mon, 7 Jan 2013 15:59:53 +0530
@@ -28969,20 +28966,3 @@ index 30f4f41..fe9b051 100644
  #define XCHAL_MAX_INSTRUCTION_SIZE	3
 -- 
 1.8.1
-
-diff --git a/gas/config/tc-xtensa.c b/gas/config/tc-xtensa.c
-index d062044..ca261ae 100644
---- a/gas/config/tc-xtensa.c
-+++ b/gas/config/tc-xtensa.c
-@@ -2228,7 +2228,7 @@ xg_reverse_shift_count (char **cnt_argp)
-   cnt_arg = *cnt_argp;
- 
-   /* replace the argument with "31-(argument)" */
--  new_arg = concat ("31-(", cnt_argp, ")", (char *) NULL);
-+  new_arg = concat ("31-(", cnt_arg, ")", (char *) NULL);
- 
-   free (cnt_arg);
-   *cnt_argp = new_arg;
--- 
-2.10.1
-