fbdev: ssd1307fb: Fix charge pump setting

Make sure bit 4 is set for the charge pump setting. It is required according
to SSD1306 App Note.
Signed-off-by: NJulian Scheel <julian@jusst.de>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/ssd1307fb.c

@@ -389,7 +389,7 @@ static int ssd1307fb_init(struct ssd1307fb_par *par)
 		return ret;
 
 	ret = ssd1307fb_write_cmd(par->client,
-		(par->device_info->need_chargepump & 0x1 << 2) & 0x14);
+		BIT(4) | (par->device_info->need_chargepump ? BIT(2) : 0));
 	if (ret < 0)
 		return ret;