Revert "uboot-mediatek: fix build on Mac OS X"

This reverts commit 997ff740dc.
78cbd5apick as it should be fixed in commit 78cbd5a57e11 ("tools: macOS:
types.h: fix missing unsigned types").

References: #13833
Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/boot/uboot-mediatek/patches/260-add-missing-type-u64.patch

@@ -1,10 +0,0 @@
---- a/include/linux/types.h
-+++ b/include/linux/types.h
-@@ -1,6 +1,7 @@
- #ifndef _LINUX_TYPES_H
- #define _LINUX_TYPES_H
- 
-+typedef unsigned long long __u64;
- #include <linux/posix_types.h>
- #include <asm/types.h>
- #include <stdbool.h>