i3c: dw: Fix memory leak in dw_i3c_master_i2c_xfers()

i3c: dw: Fix memory leak in dw_i3c_master_i2c_xfers()

The dw_i3c_master_i2c_xfers() function allocates memory for the xfer
structure using dw_i3c_master_alloc_xfer(). If pm_runtime_resume_and_get()
fails, the function returns without freeing the allocated xfer, resulting
in a memory leak.

Add a dw_i3c_master_free_xfer() call to the error path to ensure the
allocated memory is properly freed.

Compile tested only. Issue found using a prototype static analysis tool
and code review.

Fixes: 62fe9d06f570 ("i3c: dw: Add power management support")
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260126081121.644099-1-zilin@seu.edu.cn
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>