nb/intel/x4x/raminit: Remove very long delay

It is not really known why there is such a long delay, but it works
fine without it.

TESTED on ga-g41m-es2l.

Change-Id: Idff5b978bbf161f8520d8000848e7b11c98c3945
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/19514
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/northbridge/intel/x4x/raminit_ddr2.c

@@ -1923,8 +1923,6 @@ void raminit_ddr2(struct sysinfo *s)
 			die("Error: DDR is faster than FSB, halt\n");
 	}
 
-	mdelay(250);
-
 	// Program clock crossing
 	clkcross_ddr2(s);
 	printk(BIOS_DEBUG, "Done clk crossing\n");