yaffs2-utils: update to latest git (20221209 -> 20260629)

Advance the SRCREV by 14 commits to the current master tip
(474b3acb, committed 2026-06-29) and bump PV to that commit date per
the recipe's date-based versioning convention.

Notable changes in this range (Aleph One / Charles Manning):
 * yaffs_guts.c: fix the size of the allocated buffer for unmanaged
   buffers (real bugfix).
 * Fully deinitialise the cache when unmounting (real bugfix).
 * yaffs_guts.c: use AND instead of remainder for hash calculation.
 * Move Linux attribute handling out of the core into
   yaffs_linux_attribs.c (affects only the out-of-tree kernel module,
   which this recipe does not build).
 * Remove K&R function declarations, silence gcc warnings on the dtest
   filename array, several benign typo/whitespace cleanups, and
   power-fail stress-test reporting improvements.

Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-filesystems/recipes-filesystems/yaffs2/yaffs2-utils_git.bb

@@ -10,7 +10,7 @@ LIC_FILES_CHKSUM = "file://utils/mkyaffs2image.c;beginline=11;endline=13;md5=5f5
                     "
 
 # The commit date of SRCREV
-PV = "20221209"
+PV = "20260629"
 
 DEPENDS = "mtd-utils"
 
@@ -21,7 +21,7 @@ SRC_URI = "git://github.com/Aleph-One-Ltd/yaffs2;protocol=https;branch=master \
            file://0004-utils-Makefile-fix-symbolic-links.patch \
            "
 
-SRCREV = "68030683543cccb4d942e3fedbcad1dc267e261c"
+SRCREV = "474b3acb927d27b2305618aaf24456b9d33fe91b"
 
 UPSTREAM_CHECK_COMMITS = "1"