mmc: core: Fix comparison issue in mmc_compare_ext_csds

Found this issue during code review. Actually, there are two issues which
both compensate together in lucky case.  In unlucky case the bus width
probing might not work as expected.
Signed-off-by: NJurgen Heeks <jurgen.heeks@nokia.com>
Reviewed-by: NNamjae Jeon <linkinjeon@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

drivers/mmc/core/mmc.c

@@ -376,7 +376,7 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 	}
 
 	card->ext_csd.raw_hc_erase_gap_size =
-		ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
+		ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 	card->ext_csd.raw_sec_trim_mult =
 		ext_csd[EXT_CSD_SEC_TRIM_MULT];
 	card->ext_csd.raw_sec_erase_mult =
@@ -551,7 +551,7 @@ static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 		goto out;
 
 	/* only compare read only fields */
-	err = (!(card->ext_csd.raw_partition_support ==
+	err = !((card->ext_csd.raw_partition_support ==
 			bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 		(card->ext_csd.raw_erased_mem_count ==
 			bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&