[EFR32] build with Core 2.1.0 #377

Job	Run time
build (esp8266:esp8266:nodemcuv2)	2m 35s
build (esp32:esp32:esp32:PartitionScheme=min_spiffs)	3m 20s
build (esp32:esp32:esp32s2)	3m 19s
build (esp32:esp32:esp32s3)	3m 15s
build (esp32:esp32:esp32c3)	2m 59s
build (esp32:esp32:esp32c6)	3m 17s
build (esp32:esp32:esp32h2)	3m 18s
build (STM32:stm32:Nucleo_64)	2m 4s
build (STMicroelectronics:stm32:GenF1)	4s
build (STMicroelectronics:stm32:GenWL)	8s
build (raspberry)	57s
build (energia:cc13xx:LAUNCHXL_CC1310)	3m 18s
build (CubeCell:CubeCell:CubeCell-GPS)	3m 7s
build (CubeCell:CubeCell:CubeCell-Board-PRO)	3m 14s
build (adafruit:nrf52:pca10056)	3m 10s
build (arduino:mbed_edge:edge_control)	3m 19s
build (arduino:samd:mzero_bl)	3m 10s
build (arduino:avr:mega)	35s
build (arduino:renesas_uno:minima)	3m 19s
build (arduino:renesas_uno:unor4wifi)	3m 19s
build (rp2040:rp2040:generic)	3m 19s
build (rp2040:rp2040:rpipicow)	3m 17s
build (arduino:mbed_rp2040:pico)	3m 18s
build (SiliconLabs:silabs:nano_matter)	1m 46s
build (WCH:ch32v:CH32V30x_EVT)	1s
	1h 3m 28s

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