simplicity_sdk: add EFR32MG22 support

Import EFR32MG22 files from simplicity_sdk

Signed-off-by: James Smith <[email protected]>

Author: loopj

scripts/import_simplicity_sdk.py

@@ -25,8 +25,8 @@
   "platform/Device/SiliconLabs/EFR32BG2[279]/Source/system_*.c",
   "platform/Device/SiliconLabs/EFR32FG2[3]/Include/*.h",
   "platform/Device/SiliconLabs/EFR32FG2[3]/Source/system_*.c",
-  "platform/Device/SiliconLabs/EFR32MG2[149]/Include/*.h",
-  "platform/Device/SiliconLabs/EFR32MG2[149]/Source/system_*.c",
+  "platform/Device/SiliconLabs/EFR32MG2[1249]/Include/*.h",
+  "platform/Device/SiliconLabs/EFR32MG2[1249]/Source/system_*.c",
   "platform/Device/SiliconLabs/EFR32ZG2[3]/Include/*.h",
   "platform/Device/SiliconLabs/EFR32ZG2[3]/Source/system_*.c",
   "platform/Device/SiliconLabs/EFM32PG2[38]/Include/*.h",