[PATCH] mtd: cfi: use struct_size() helper for cfiq allocation

[Gopi Krishna Menon]

Hi Vignesh, Thanks for the review.

Regarding the other occurrence you pointed out in jedec_probe.c, after your
reply, someone (Rahul Kumar) submitted a patch addressing that occurence
in jedec_probe.c. 

link: https://lore.kernel.org/linux-kernel-mentees/20250922071137.900508-1-rk0006818@gmail.com/T/#u

Please let me know if any further changes are needed on my side.