mtd: spi-nor: enable protection ops for SST26 flash series

mtd: spi-nor: enable protection ops for SST26 flash series

Commit cce39d2d20e7 (mtd: spi: Switch to new SPI NOR framework)
performs switch from previous 'spi_flash' infrastructure without
proper testing/investigations which results in a regressions for
SST26 flash series.

Enable protection ops for SST26 flash series which were
previously enabled by
Commit 1234b49668a8 (mtd: sf: Add support of sst26wf* flash ICs
protection ops)

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>