kernel: bump 6.12 to 6.12.48

kernel: bump 6.12 to 6.12.48

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.48

Remove upstreamed patches:
generic/backport-6.12/630-v6.17-bpf-Allow-fall-back-to-interpreter-for-programs-with.patch [1]

All other patches auto-refreshed.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.48&id=82967254a92e3c5a832f178ef7e7fad4c9ac3d34

Build system: x86/64
Build-tested: flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3, x86/64-glibc
Run-tested: flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3, x86/64-glibc

Tested-by: John Audia <[email protected]>
Signed-off-by: Goetz Goerisch <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20096
Signed-off-by: Hauke Mehrtens <[email protected]>