device/dram/ddr3: Get rid of useless typedefs

These typedefs are not necessary. Remove them, and rename some elements
to avoid any confusion with other DRAM generations, such as DDR4.

Change-Id: Ibe40f33372358262c540e371f7866b06a4ac842a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51895
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/sandybridge/raminit_common.h b/src/northbridge/intel/sandybridge/raminit_common.h
index b93902a..1622259 100644
--- a/src/northbridge/intel/sandybridge/raminit_common.h
+++ b/src/northbridge/intel/sandybridge/raminit_common.h
@@ -322,7 +322,7 @@
 
 /* WARNING: Do not forget to increase MRC_CACHE_VERSION when this struct is changed! */
 typedef struct dimm_info_st {
-	dimm_attr dimm[NUM_CHANNELS][NUM_SLOTS];
+	struct dimm_attr_ddr3_st dimm[NUM_CHANNELS][NUM_SLOTS];
 } dimm_info;
 
 /* WARNING: Do not forget to increase MRC_CACHE_VERSION when this struct is changed! */