CVE-2026-43484 mmc: core: Avoid bitfield RMW for claim/retune flags

In the Linux kernel, the following vulnerability has been resolved: mmc: core: Avoid bitfield RMW for claim/retune flags Move claimed and retune control flags out of the bitfield word to avoid unrelated RMW side effects in asynchronous contexts. The host-claimed bit shared a word with retune flag...