PNP: isapnp: use put_user() in the proc read loop

isapnp_proc_bus_read() checks the user buffer with access_ok() and then
copies the configuration registers one byte at a time with __put_user(),
reading each register in between.  Each of those accesses enables and
disables user access on its own, so the up-front check saves nothing.

Use put_user().  The ignored return value and the access_ok() stay as
they were.

This is part of getting rid of __get_user() and __put_user() entirely.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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