nb/intel/snb/raminit_mrc.c: Remove set but unused variable

Change-Id: I1cf656b404b0e880c061b273ef259ca40a6d499a
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63071
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/northbridge/intel/sandybridge/raminit_mrc.c b/src/northbridge/intel/sandybridge/raminit_mrc.c
index 0bc33b6..a30525e 100644
--- a/src/northbridge/intel/sandybridge/raminit_mrc.c
+++ b/src/northbridge/intel/sandybridge/raminit_mrc.c
@@ -394,7 +394,7 @@
 
 static void setup_sdram_meminfo(struct pei_data *pei_data)
 {
-	u32 addr_decoder_common, addr_decode_ch[2];
+	u32 addr_decode_ch[2];
 	struct memory_info *mem_info;
 	struct dimm_info *dimm;
 	int dimm_size;
@@ -404,7 +404,6 @@
 	mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(struct memory_info));
 	memset(mem_info, 0, sizeof(struct memory_info));
 
-	addr_decoder_common = mchbar_read32(MAD_CHNL);
 	addr_decode_ch[0] = mchbar_read32(MAD_DIMM_CH0);
 	addr_decode_ch[1] = mchbar_read32(MAD_DIMM_CH1);