DDR3: Use the right nibble from byte 21 as the MSB of tRAS.

git-svn-id: http://lm-sensors.org/svn/i2c-tools/branches/i2c-tools-3.1@6152 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -10,6 +10,7 @@ SVN HEAD
                 Fix decoding of SDR SPD revision
                 Prevent hang on reserved DDR3 module type
                 Decode more DDR3 module types
+                Fix DDR3 tRAS decoding
   i2cdetect: Clarify the SMBus commands used for probing by default
   i2c-dev.h: Minimize differences with kernel flavor
              Move SMBus helper functions to include/i2c/smbus.h

eeprom/decode-dimms

@@ -1228,7 +1228,7 @@ sub decode_ddr3_sdram($)
 	$taa  = int($bytes->[16] / $bytes->[12]);
 	$trcd = int($bytes->[18] / $bytes->[12]);
 	$trp  = int($bytes->[20] / $bytes->[12]);
-	$tras = int((($bytes->[21] >> 4) * 256 + $bytes->[22]) / $bytes->[12]);
+	$tras = int(((($bytes->[21] & 0x0f) << 8) + $bytes->[22]) / $bytes->[12]);
 
 	printl("tCL-tRCD-tRP-tRAS", join("-", $taa, $trcd, $trp, $tras));