Define a thrift structure for Bsp Kmod Files

Summary:
Formally defining in platform_manager_config.thrift as a code reference.
This will get written as part of BSP. PM will read them to unload kmods for the installed rpm.

Example json file for Tahan

{P1605773412}

Reviewed By: tao-ren

Differential Revision: D63276490

fbshipit-source-id: 905c19b38b2b56b5a384c45f524eeada6724da0b

fboss/platform/platform_manager/platform_manager_config.thrift

@@ -489,6 +489,19 @@ struct PmUnitVersion {
   3: i16 productSubVersion;
 }
 
+// Defines thrift structure used for the Bsp Kmods file under /usr/local/{vendor}_bsp/...
+// This file will be written during BSP development. PM will consume this file to unload
+// specified kmods before exploration.
+//
+// `bspKmods`: Specify the list of names of bsp kmods on the installed rpm.
+//
+// `sharedKmods`: Specify the list of names of shared kmods on the installed rpm.
+// These shared kmods will be unloaded after bspKmods.
+struct BspKmodsFile {
+  1: list<string> bspKmods;
+  2: list<string> sharedKmods;
+}
+
 // Defines the whole Platform. The top level struct.
 struct PlatformConfig {
   // Name of the platform.  Should match the name set in dmidecode