util/spd_tools: Modify MT53E1G32D2NP-046 WT:B LPDDR4 config

CB:52586 ("util/spd_tools: Add MT53E1G32D2NP-046 WT:B LPDDR4 config")
incorrectly set ranks per channel to 1. However, MT53E1G32D2NP-046 WT:B
part has 2 channels per die and 2 physical dies. Each channel in each die shares DQ-DQS lines with the channel in other die and uses separate CS lines. Thus, number of ranks per channel is 2.

This change fixes the attribute ranksPerChannel for MT53E1G32D2NP-046 WT:B in LP4x global config by setting it to 2.

BUG=b:186616388

Change-Id: Iba87754ca04c2e026a9cbc8ef07412b467140cba
Signed-off-by: Amanda Huang <amanda_hwang@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55000
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

util/spd_tools/lp4x/global_lp4x_mem_parts.json.txt

@@ -68,7 +68,7 @@
                 "channelsPerDie": 2,
                 "diesPerPackage": 2,
                 "bitWidthPerChannel": 16,
-                "ranksPerChannel": 1,
+                "ranksPerChannel": 2,
                 "speedMbps": 4267
             }
         },