kernel: Fix section mismatch in ubi

kernel: Fix section mismatch in ubi

Fix ubiblock_create_from_param() ubiblock_create_auto_rootfs section mismatch.
Without this, the system upgrade will not work if the kernel was compiled with clang-18.

WARNING: modpost: vmlinux: section mismatch in reference: ubiblock_notify+0x190 (section: .text) -> ubiblock_create_auto_rootfs (section: .init.text)

```
[33342.080771] Call trace:
[33342.083205]  ubiblock_create_auto_rootfs+0x0/0xd0
[33342.087902]  blocking_notifier_call_chain+0xb0/0x1a0
[33342.092857]  ubi_volume_notify+0xcc/0xdc
[33342.096773]  ubi_create_volume+0x520/0x684
[33342.100861]  ubi_cdev_ioctl+0x2ac/0x834
[33342.104688]  __arm64_sys_ioctl+0x14f0/0x15f4
[33342.108947]  invoke_syscall+0x44/0xc8
[33342.112601]  do_el0_svc+0x78/0xa8
[33342.115907]  el0_svc+0x24/0x50
[33342.118951]  el0t_64_sync_handler+0x88/0xf0
[33342.123126]  el0t_64_sync+0x150/0x154
[33342.126784] Code: ???????? ???????? ???????? ???????? (????????)
```
Signed-off-by: Romanov Danila <pervokur@gmail.com>