LF-5461 nvmem: imx: fix the bug that imx-ocotp-fsb-s400.c is not compiled

commit f5d5aa657ef3e6ba7a348e432fb8bd6436768559 from
https://source.codeaurora.org/external/imx/linux-imx

Renaming files relevant to sentinel causes imx-ocotp-fsb-s400.c is not
compiled.

Fixes: 2601f7ac2409 ("Nomenclature changes from sentinel to ele")

Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>