kernel: bump 6.6 to 6.6.108

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.108

Signed-off-by: Goetz Goerisch <ggoerisch@gmail.com>
Link: openwrt/openwrt#20214
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

Author: GoetzGoerisch

target/linux/generic/kernel-6.6

@@ -1,2 +1,2 @@
-LINUX_VERSION-6.6 = .107
-LINUX_KERNEL_HASH-6.6.107 = c9b73017d3c7867b9c69a542e5318620cf2b14ed23d52f6aeaaee8aded9ee447
+LINUX_VERSION-6.6 = .108
+LINUX_KERNEL_HASH-6.6.108 = 601cd332aa695d16607b353feff369b4a0b36d111be077e8af54bdd41e1968a6