Fixes for linux headers 6.6.62

[gseqBE]

Compilation fixes for Tested on PI Zero, Linux 6.6.62+rpt-rpi-v8 Bookworm

Details:

[gseqBE]

@adrianomarto
Could you have a look at this. Thanks.

[h0nIg]

@gseqBE @ahoenerBE are you sure this fixes all errors? with 6.12 i get:

make -C /usr/src/linux-headers-6.12.47+rpt-rpi-v6 M=/home/xxx/soft_uart/soft_uart modules
make[1]: Entering directory '/usr/src/linux-headers-6.12.47+rpt-rpi-v6'
  CC [M]  /home/xxx/soft_uart/soft_uart/module.o
/home/xxx/soft_uart/soft_uart/module.c:47:22: error: initialization of ‘ssize_t (*)(struct tty_struct *, const u8 *, size_t)’ {aka ‘int (*)(struct tty_struct *, const unsigned char *, unsigned int)’} from incompatible pointer type ‘long int (*)(struct tty_struct *, const unsigned char *, long unsigned int)’ [-Werror=incompatible-pointer-types]
   47 |   .write           = soft_uart_write,
      |                      ^~~~~~~~~~~~~~~
/home/xxx/soft_uart/soft_uart/module.c:47:22: note: (near initialization for ‘soft_uart_operations.write’)