src/include: Drop unneeded empty lines

Change-Id: Ie325541547ea10946f41a8f979d144a06a7e80eb
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44611
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/include/device/dram/ddr3.h

@@ -19,7 +19,6 @@
 #include <device/dram/common.h>
 #include <types.h>
 
-
 /**
  * Convenience definitions for SPD offsets
  *