CVE-2026-45863: i3c: dw: Fix memory leak in dw_i3c_master_i2c_xfers()

In the Linux kernel, the following vulnerability has been resolved:

i3c: dw: Fix memory leak in dwi3cmasteri2cxfers()

The dwi3cmasteri2cxfers() function allocates memory for the xfer structure using dwi3cmasterallocxfer(). If pmruntimeresumeandget() fails, the function returns without freeing the allocated xfer, resulting in a memory leak.

Add a dwi3cmasterfreexfer() 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.