nb/intel/haswell: Drop unnecessary register read

Reading MAD_CHNL has no effect, so there's no need to read it here.

Change-Id: I8d2aa4787de7f54f49d161f61c9c0abaa811cb83
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46361
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/northbridge/intel/haswell/raminit.c

@@ -227,8 +227,6 @@ void setup_sdram_meminfo(struct pei_data *pei_data)
 
 	memset(mem_info, 0, sizeof(struct memory_info));
 
-	/* FIXME: Do we need to read MCHBAR32(MAD_CHNL) ? (Answer: Nope) */
-	MCHBAR32(MAD_CHNL);
 	addr_decode_ch[0] = MCHBAR32(MAD_DIMM_CH0);
 	addr_decode_ch[1] = MCHBAR32(MAD_DIMM_CH1);