control:p10bmc:rainier-4u/1s4u - Comment repurpose of memory temps

To have different t-control points for the 2U and 4U sized dimms, the
external memory buffer/dram temp sensor type will be repurposed to
report the dram temperatures of 4U DDIMMs. Additionally, the external
memory buffer temp sensor type will be repurposed to report the pmic
temperatures of 4U DDIMMs.

Change-Id: I5b05085acb51cfdf8d1809cc11e3b4498844de0b
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json b/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json
index 67029fb..741a95a 100644
--- a/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json
+++ b/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json
@@ -190,6 +190,7 @@
    ]
  },
  {
+   // Repurposed as DRAM temperature sensors for 4U DDIMMs
    "name": "dram and external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_dram_extmb_temp",
@@ -211,6 +212,7 @@
    ]
  },
  {
+   // Repurposed as PMIC temperature sensors for 4U DDIMMs
    "name": "external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_extmb_temp",
diff --git a/control/config_files/p10bmc/ibm,rainier-4u/groups.json b/control/config_files/p10bmc/ibm,rainier-4u/groups.json
index 930b9bc..46b716e 100644
--- a/control/config_files/p10bmc/ibm,rainier-4u/groups.json
+++ b/control/config_files/p10bmc/ibm,rainier-4u/groups.json
@@ -340,6 +340,7 @@
    ]
  },
  {
+   // Repurposed as DRAM temperature sensors for 4U DDIMMs
    "name": "dram and external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_dram_extmb_temp",
@@ -377,6 +378,7 @@
    ]
  },
  {
+   // Repurposed as PMIC temperature sensors for 4U DDIMMs
    "name": "external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_extmb_temp",