linux 6.7 compat: handle member rename in current_time() check

6.7 changed the names of the time members in struct inode. We still want
to use their specific types to handle <4.18 properly, so we just use a
define to rename it back to what we need it to be in this test.

Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://github.com/sponsors/robn

config/kernel-current-time.m4

@@ -2,8 +2,12 @@ dnl #
 dnl # 4.9, current_time() added
 dnl # 4.18, return type changed from timespec to timespec64
 dnl #
+dnl # 6.7 renamed i_atime but did not change its type. We use a define to
+dnl # rename it back for this test.
+dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_CURRENT_TIME], [
 	ZFS_LINUX_TEST_SRC([current_time], [
+		#define __i_atime i_atime
 		#include <linux/fs.h>
 	], [
 		struct inode ip __attribute__ ((unused));