lv_fs_seek() function
Set the position of the 'cursor' (read write pointer) in a file
Arguments
file_p
pointer to a lv_fs_file_t variable
pos
the new position expressed in bytes index (0: start of file)
whence
tells from where set the position. See @lv_fs_whence_t
Return value
LV_FS_RES_OK or any error from lv_fs_res_t enum