drm/ssd130x: Fix pre-charge period setting

Fix small typo which causes the mask for the 'precharge1' setting
to be used with the 'precharge2' value.
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220706184133.210888-1-ezequiel@vanguardiasur.com.ar

drivers/gpu/drm/solomon/ssd130x.c

@@ -350,7 +350,7 @@ static int ssd130x_init(struct ssd130x_device *ssd130x)
 
 	/* Set precharge period in number of ticks from the internal clock */
 	precharge = (SSD130X_SET_PRECHARGE_PERIOD1_SET(ssd130x->prechargep1) |
-		     SSD130X_SET_PRECHARGE_PERIOD1_SET(ssd130x->prechargep2));
+		     SSD130X_SET_PRECHARGE_PERIOD2_SET(ssd130x->prechargep2));
 	ret = ssd130x_write_cmd(ssd130x, 2, SSD130X_SET_PRECHARGE_PERIOD, precharge);
 	if (ret < 0)
 		return ret;