utils: mtd-utils: update to 2.2.1

utils: mtd-utils: update to 2.2.1

Release notes:
https://lists.infradead.org/pipermail/linux-mtd/2024-September/106193.html

Small size increase:
61380 bin/targets/ath79-old/nand/packages/nand-utils_2.2.0-r1_mips_24kc.ipk
92913 bin/targets/ath79-old/nand/packages/ubi-utils_2.2.0-r1_mips_24kc.ipk
61413 bin/targets/ath79-new/nand/packages/nand-utils_2.2.1-r1_mips_24kc.ipk
92640 bin/targets/ath79-new/nand/packages/ubi-utils_2.2.1-r1_mips_24kc.ipk

Link: https://github.com/openwrt/openwrt/pull/16594
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>