mmc-utils: Fix scaling of cache size

JESD84-B51 7.4.30 CACHE_SIZE [252:249] states that "the size is
indicated as multiple of kilobits". This is also supported by Table 39,
"e.MMC internal sizes and related Units / Granularities" which lists
"32Kb (=4KB)" as the cache size granularity for 4KiB native devices.
Signed-off-by: Patrick Oppenlander <patrick.oppenlander@gmail.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20200401221453.267360-1-patrick.oppenlander@gmail.com

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

mmc_cmds.c

@@ -1419,8 +1419,8 @@ int do_read_extcsd(int nargs, char **argv)
 		printf("Power off notification [POWER_OFF_LONG_TIME: 0x%02x]\n",
 			ext_csd[247]);
 		printf("Cache Size [CACHE_SIZE] is %d KiB\n",
-			ext_csd[249] << 0 | (ext_csd[250] << 8) |
-			(ext_csd[251] << 16) | (ext_csd[252] << 24));
+			(ext_csd[249] << 0 | (ext_csd[250] << 8) |
+			(ext_csd[251] << 16) | (ext_csd[252] << 24)) / 8);
 	}
 
 	/* A441: Reserved [501:247]