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 <[e-mail]>
Acked-by: Javier Martinez Canillas <[e-mail]>
Signed-off-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/solomon/ssd130x.c

···
 
 	/* 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;