AP_HAL_SITL: report baudlimit_enable in bw_in_bytes_per_second function #1

Job	Run time
build (stm32f7, chibios, 10)	14m 41s
build (stm32h7, chibios, 10)	13m 8s
build (fmuv2-plane, chibios, 10)	6m 2s
build (periph-build, chibios, 10)	14m 24s
build (iofirmware, chibios, 10)	2m 53s
build (CubeOrange-bootloader, chibios, 10)	1m 20s
build (fmuv3-bootloader, chibios, 10)	1m 34s
build (revo-bootloader, chibios, 10)	1m 13s
build (stm32h7-debug, chibios, 10)	7m 12s
build (fmuv3, chibios, 10)	13m 38s
build (revo-mini, chibios, 10)	10m 57s
build (MatekF405-Wing, chibios, 10)	11m 19s
build (CubeOrange-ODID, chibios, 10)	8m 49s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 18s
build (configure-all, chibios, 10)	9m 36s
build (build-options-defaults-test, chibios, 10)	27m 3s
build (signing, chibios, 10)	10m 0s
build (CubeOrange-PPP, chibios, 10)	7m 25s
build (SOHW, chibios, 10)	13m 15s
build (Pixhawk6X-PPPGW, chibios, 10)	3m 40s
	2h 59m 27s

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