i3c: master: renesas: Use __free(kfree) for xfer cleanup in renesas_i3c_send_ccc_cmd()

i3c: master: renesas: Use __free(kfree) for xfer cleanup in renesas_i3c_send_ccc_cmd()

Use __free(kfree) for automatic cleanup, matching the pattern already
used in other functions in this driver.

Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260406-renesas-v3-2-4b724d7708f4@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>