driver: misc: correct Kconfig entry

driver: misc: correct Kconfig entry

Should use FSL_SEC_MON, not CONFIG_FSL_SEC_MON as Kconfig entry.

Signed-off-by: Peng Fan <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: York Sun <[email protected]>
Cc: Stefan Roese <[email protected]>
Cc: Tom Rini <[email protected]>
Acked-by: Simon Glass <[email protected]>