fbdev: aty: fix missing indentation in if statement

There is a missing indentation following an if statement, fix this.

Detected by Coccinelle:
drivers/video/fbdev/aty/mach64_ct.c:183:2-15: code aligned with
following code on line 184
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/aty/mach64_ct.c

@@ -180,7 +180,7 @@ static int aty_dsp_gt(const struct fb_info *info, u32 bpp, struct pll_ct *pll)
 		dsp_on = ((multiplier << vshift) + divider) / divider;
 		tmp = ((ras_multiplier << xshift) + ras_divider) / ras_divider;
 		if (dsp_on < tmp)
-		dsp_on = tmp;
+			dsp_on = tmp;
 		dsp_on = dsp_on + (tmp * 2) + (pll->xclkpagefaultdelay << xshift);
 	}