cinterion,helpers: fix warnings with -Wdiscarded-qualifiers
CC cinterion/tests/test_modem_helpers_cinterion-test-modem-helpers-cinterion.o
cinterion/tests/test-modem-helpers-cinterion.c: In function ‘test_slcc_urc_single’:
cinterion/tests/test-modem-helpers-cinterion.c:749:64: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
749 | { 1, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE, "123456789" }
| ^~~~~~~~~~~
cinterion/tests/test-modem-helpers-cinterion.c: In function ‘test_slcc_urc_multiple’:
cinterion/tests/test-modem-helpers-cinterion.c:764:65: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
764 | { 2, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE, "123456789" },
| ^~~~~~~~~~~
cinterion/tests/test-modem-helpers-cinterion.c:765:65: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
765 | { 3, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE, "987654321" },
| ^~~~~~~~~~~
cinterion/tests/test-modem-helpers-cinterion.c: In function ‘test_slcc_urc_complex’:
cinterion/tests/test-modem-helpers-cinterion.c:781:65: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
781 | { 1, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE, "123456789" },
| ^~~~~~~~~~~
cinterion/tests/test-modem-helpers-cinterion.c:782:65: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
782 | { 2, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_WAITING, "987654321" },
|