autoscroll() bug

[fsincere]

I tried Screen.autoscroll() with MicroPython 1.17 on NUCLEO-L476RG board,
and Grove 16x2 LCD RGB backlight v4.0
It does not work.

Here is my fix :

def autoscroll(self, state):
        if state:
            # self.disp_ctrl |= self.LCD_ENTRYSHIFTINCREMENT
            # self.cmd(self.LCD_DISPLAYCONTROL  | self.disp_ctrl)
            self.disp_mode |= self.LCD_ENTRYSHIFTINCREMENT  
            self.cmd(self.LCD_ENTRYMODESET  | self.disp_mode) 

        else:
            # self.disp_ctrl &= ~self.LCD_ENTRYSHIFTINCREMENT
            # self.cmd(self.LCD_DISPLAYCONTROL  | self.disp_ctrl)
            self.disp_mode &= ~self.LCD_ENTRYSHIFTINCREMENT  
            self.cmd(self.LCD_ENTRYMODESET  | self.disp_mode)