Disable the Atmos keyboard's CAPS LOCK for stdio too.

Normally, CAPS LOCK is active because the Oric Atmos's default programming language, BASIC, requires upper-case keywords.  It's turned off if cgetc() is used in a cc65 program.  When I added a console read(), I forgot to turn it off for that input also.  This patch fixes that oversight (better late than never).
I certainly don't obligate you to change this back but I'm very much into consistency - and afaik the cc65 idiom for clearing the X reg is rather what you removed than what you added.