Fix uart disabling with rdc2 #2453

Job	Run time
variables	1s
fc_matrix (saluki-pi_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-pi/px4_bin_ed25519_... / build	9m 45s
fc_matrix (saluki-nxp93_default) / build	8m 26s
fc_matrix (saluki-pi_amp) / build	9m 38s
fc_matrix (saluki-nxp93_flat) / build	6m 43s
fc_matrix (saluki-pi_default) / build	9m 35s
fc_matrix (saluki-v2_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-v2/px4_bin_ed25519_... / build	9m 32s
fc_matrix (saluki-pi_flat) / build	7m 11s
fc_matrix (saluki-v2_amp) / build	9m 47s
fc_matrix (saluki-v2_default) / build	9m 44s
fc_matrix (saluki-v2_flat) / build	7m 8s
fc_matrix (saluki-v3_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-v3/px4_bin_ed25519_... / build	9m 54s
fc_matrix (saluki-v3_amp) / build	9m 35s
fc_matrix (saluki-v3_default) / build	10m 50s
fc_matrix (saluki-v3_flat) / build	6m 59s
build px4fwupdater	2m 18s
upload builds to UAE artifactory	4m 43s
upload px4fwupdater to docker registry	3m 58s
upload px4fwupdater to UAE docker registry	0s
	2h 15m 47s

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