[genhd] Add incrementing drivep in show_drive_info

[tyama501]

Hello @ghaerr

Yes, the fix for #2377 worked.
Thank you!

[ghaerr]

Thanks @tyama501. BTW, in the uname -a above, what is the graphics triangular character displayed in the date field?

[tyama501]

It occurs when I build it with Japanese supported terminal and the build date has kanji.
It does not occur if I build it with English terminal.

[ghaerr]

I see. Does that display proper kanji only on PC-98 console, or also used to display using UTF-8 or japanese byte encoding on serial terminal?

[tyama501]

Well, I haven't try that on the serial console but it might be able to display it.
It should display 月 which means month.
I will try it when I have time.