Xiegu G90 errors

[mdblack98]

rig_model=Xiegu G90 20240504.8

0x25 command not working well and also not documented in G90 CI-V reference

Echo is wrong for example.
[2024-05-05 19:03:12.983848][00:00:08.117498][RIGCTRL:trace] 0000 fe fe a4 e0 25 00 00 40 07 21 00 fd ....%..@.!..
[2024-05-05 19:03:13.009858][00:00:08.143519][RIGCTRL:trace] read_string_generic(): RX 11 characters, direct=1
[2024-05-05 19:03:13.009858][00:00:08.143534][RIGCTRL:trace] 0000 fe fe a4 e0 25 00 00 40 07 00 fd ....%..@...

And gives the wrong answers too
[2024-05-05 19:09:23.710884][00:00:08.886608][RIGCTRL:trace] 0000 fe fe a4 e0 25 00 fd ....%..
[2024-05-05 19:09:23.734344][00:00:08.909621][RIGCTRL:trace] read_string_generic(): RX 7 characters, direct=1
[2024-05-05 19:09:23.734344][00:00:08.909637][RIGCTRL:trace] 0000 fe fe a4 e0 25 00 fd ....%..
[2024-05-05 19:09:23.734344][00:00:08.909645][RIGCTRL:trace] icom_one_transaction: DEBUG retval=7, frm_len=7, cmd=0x25
[2024-05-05 19:09:23.758347][00:00:08.933619][RIGCTRL:trace] read_string_generic(): RX 12 characters, direct=1
[2024-05-05 19:09:23.758347][00:00:08.933633][RIGCTRL:trace] 0000 fe fe e0 a4 25 01 00 40 07 28 00 fd ....%..@.(..

[mdblack98]

Commit 95f2e9b hopefully addresses this.