mmc-utils: fix compilation on mips64

This commit adds a patch to remove a superfluous include.
Removing this include prevents the following error (detected by LEDE
project's buildbot while compiling for mips64 architecture):

(Note: directory names shorted for better readability)

In file included from mmc.h:20:0,
                 from mmc_cmds.c:37:
/srv/.../include/asm-generic/int-ll64.h:29:44: error: conflicting types for '__s64'
 __extension__ typedef __signed__ long long __s64;
                                            ^
In file included from /srv/.../include/asm/types.h:22:0,
                 from /srv/.../include/linux/types.h:4,
                 from /srv/.../include/linux/fs.h:11,
                 from mmc_cmds.c:35:
/srv/.../include/asm-generic/int-l64.h:28:25: note: previous declaration of '__s64' was here
 typedef __signed__ long __s64;
                         ^
In file included from mmc.h:20:0,
                 from mmc_cmds.c:37:
/srv/.../include/asm-generic/int-ll64.h:30:42: error: conflicting types for '__u64'
 __extension__ typedef unsigned long long __u64;
                                          ^
In file included from /srv/.../include/asm/types.h:22:0,
                 from /srv/.../include/linux/types.h:4,
                 from /srv/.../include/linux/fs.h:11,
                 from mmc_cmds.c:35:
/srv/.../include/asm-generic/int-l64.h:29:23: note: previous declaration of '__u64' was here
 typedef unsigned long __u64;
                       ^
Makefile:36: recipe for target 'mmc_cmds.o' failed

The patch was already sent upstream, no response yet.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

utils/mmc-utils/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mmc-utils
 PKG_VERSION=2016-09-11-$(PKG_SOURCE_VERSION)
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git

utils/mmc-utils/patches/002-mmc-ll64.patch

@@ -0,0 +1,12 @@
+Sent already upstream, no response yet.
+
+--- a/mmc.h	2016-09-11 18:01:53.000000000 +0200
++++ b/mmc.h	2016-09-23 23:41:02.462632858 +0200
+@@ -17,7 +17,6 @@
+  * those modifications are Copyright (c) 2016 SanDisk Corp.
+  */
+ 
+-#include <asm-generic/int-ll64.h>
+ #include <linux/mmc/ioctl.h>
+ #include <stdio.h>
+