[Silabs] Shell max tokens increased. (#35533)

* [Silabs] Shell max tokens increased.

* Restyled by whitespace

---------

Co-authored-by: Restyled.io <commits@restyled.io>
diff --git a/src/platform/silabs/CHIPPlatformConfig.h b/src/platform/silabs/CHIPPlatformConfig.h
index 20b4678..c6c855e 100644
--- a/src/platform/silabs/CHIPPlatformConfig.h
+++ b/src/platform/silabs/CHIPPlatformConfig.h
@@ -137,3 +137,7 @@
 #ifndef CHIP_CONFIG_FREERTOS_USE_STATIC_QUEUE
 #define CHIP_CONFIG_FREERTOS_USE_STATIC_QUEUE 1
 #endif
+
+#ifndef CHIP_SHELL_MAX_TOKENS
+#define CHIP_SHELL_MAX_TOKENS 40
+#endif // CHIP_SHELL_MAX_TOKENS