[gpio,rtl] Remove overly strong assumption #6387

Job	Run time
Lint (quick)	3m 52s
Build documentation	7m 30s
Run OTBN smoke Test	2m 51s
Airgapped build	12m 17s
Run OTBN crypto tests	3m 15s
Lint (slow)	11m 29s
Verilated English Breakfast	8m 13s
Verible lint	0s
CW305's Bitstream	23m 16s
Build and test software	18m 12s
Verilated Earl Grey	1h 11m 30s
Build Docker Containers	2m 21s
Build and test Darjeeling software	3m 57s
QEMU smoketest	2m 32s
Earl Grey for CW310 / Build bitstream	1h 3m 9s
Earl Grey for CW310 Hyperdebug / Build bitstream	1h 7m 3s
Earl Grey for CW340 / Build bitstream	1h 35m 56s
CW310 Test ROM Tests / FPGA test	4m 18s
CW310 ROM Tests / FPGA test	42m 4s
CW310 SiVal Tests / FPGA test	25m 7s
CW310 SiVal ROM_EXT Tests / FPGA test	37m 28s
CW310 Manufacturing Tests / FPGA test	28m 16s
Hyper310 ROM_EXT Tests / FPGA test	12m 52s
Cache bitstreams to GCP	3m 51s
CW340 ROM Tests / FPGA test	1m 11s
CW340 Manufacturing Tests / FPGA test	42m 55s
CW340 ROM_EXT Tests / FPGA test	7m 35s
CW340 SiVal Tests / FPGA test	20m 20s
CW340 SiVal ROM_EXT Tests / FPGA test	5m 8s
CW340 Test ROM Tests / FPGA test	3m 47s
Verify FPGA jobs	21s
	10h 32m 36s

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