[PATCH] i3c: add missing include to internal header

[Wolfram Sang]

On Thu, Jul 17, 2025 at 02:00:47PM +0200, Wolfram Sang wrote:
> LKP found a random config which failed to build because IO accessors
> were not defined:
> 
>    In file included from drivers/i3c/master.c:21:
>    drivers/i3c/internals.h: In function 'i3c_writel_fifo':
> >> drivers/i3c/internals.h:35:9: error: implicit declaration of function 'writesl' [-Werror=implicit-function-declaration]
> 
> Add the proper header to where the IO accessors are used.
> 
> Reported-by: kernel test robot <lkp at intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202507150208.BZDzzJ5E-lkp@intel.com/
> Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>

Fixes: b7371ff9bdf7 ("i3c: master: Add inline i3c_readl_fifo() and i3c_writel_fifo()")