Add support for esmt F50L1G41LC flash chip. It is used in some recent
Cudy devices.
(cherry picked from commit c84025dea29602d149d22a86502d784f292441fe)
Link: https://github.com/openwrt/openwrt/pull/20963
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 804a2e6c513187cb809dfc890f2660fac1b3fd99)