staging: drm/imx: Remove 300ms delay after memory reset

This has been added once, but does not seem to be necessary. Tested
on i.MX51 and i.MX6.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/imx-drm/ipu-v3/ipu-common.c

@@ -673,8 +673,6 @@ static int ipu_reset(struct ipu_soc *ipu)
 		cpu_relax();
 	}
 
-	mdelay(300);
-
 	return 0;
 }