vt: keyboard: treat kbd_table as an array all the time.

The keyboard.c code seems to like to treat the kbd_table as both an
array, and as a base to do some pointer math off of.  As they really are
the same thing, and compilers are smart enough not to make a difference
anymore, just be explicit and always use this as an array to make the
code more obvious for all to read.

Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jordy Zomer <jordy@pwning.systems>
Link: https://lore.kernel.org/r/20210726134322.2274919-1-gregkh@linuxfoundation.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>