Fix error handling in rp2xxx pio assembler #58

Job	Run time
Build Website	21s
Dry Run Packaging	1m 26s
Build Examples (espressif/esp)	2m 19s
Build Examples (gigadevice/gd32)	2m 13s
Check that stm32 generated code is up to date	44s
Build Examples (microchip/avr)	2m 39s
Unit Test Regz (ubuntu-latest)	16s
Unit Test Ports (ubuntu-latest, gigadevice/gd32)	18s
Unit Test Regz (windows-latest)	1m 33s
Unit Test UF2 (ubuntu-latest)	26s
Unit Test Ports (ubuntu-latest, raspberrypi/rp2xxx)	26s
Build Examples (microchip/atsam)	2m 2s
Unit Test Regz (macos-latest)	41s
Unit Test UF2 (windows-latest)	1m 5s
Unit Test Ports (ubuntu-latest, stmicro/stm32)	27s
Build Examples (nordic/nrf5x)	2m 11s
Unit Test UF2 (macos-latest)	26s
Unit Test Ports (windows-latest, gigadevice/gd32)	1m 18s
Unit Test Ports (windows-latest, raspberrypi/rp2xxx)	1m 23s
Build Examples (nxp/lpc)	2m 6s
Unit Test Ports (windows-latest, stmicro/stm32)	1m 28s
Build Examples (stmicro/stm32)	27s
Build Examples (raspberrypi/rp2xxx)	2m 24s
Unit Test Ports (macos-latest, gigadevice/gd32)	25s
Unit Test Ports (macos-latest, raspberrypi/rp2xxx)	27s
Build Examples (wch/ch32v)	2m 11s
Unit Test Ports (macos-latest, stmicro/stm32)	31s
	32m 13s

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