CVE-2025-21845 mtd: spi-nor: sst: Fix SST write failure

In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: sst: Fix SST write failure 'commit 18bcb4aa54ea "mtd: spi-nor: sst: Factor out common write operation to sstnorwritedata"' introduced a bug where only one byte of data is written, regardless of the number of bytes...