fatfs: Enable FF_USE_STRFUNC for f_gets.
/* This option switches f_forward() function. (0:Disable or 1:Enable) */
-#define FF_USE_STRFUNC 0
+#define FF_USE_STRFUNC 1
#define FF_PRINT_LLI 0
#define FF_PRINT_FLOAT 0
#define FF_STRF_ENCODE 3
