fbcon: Call con2fb_map functions directly

These are actually fbcon ioctls which just happen to be exposed
through /dev/fb*. They completely ignore which fb_info they're called
on, and I think the userspace tool even hardcodes to /dev/fb0.

Hence just forward the entire thing to fbcon.c wholesale.

Note that this patch drops the fb_lock/unlock on the set side. Since
the ioctl can operate on any fb (as passed in through
con2fb.framebuffer) this is bogus. Also note that fbcon.c in general
never calls fb_lock on anything, so this has been badly broken
already.

With this the last user of the fbcon notifier callback is gone, and we
can garbage collect that too.

v2: add missing uaccess.h include (alpha fails to compile otherwise),
reported by kbuild.

v3: Remember to also drop the #defines (Maarten)

v4: Add the static inline to dummy functions.

Signed-off-by: Daniel Vetter <[email protected]>
Reviewed-by: Sam Ravnborg <[email protected]>
Reviewed-by: Maarten Lankhorst <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: Hans de Goede <[email protected]>
Cc: Yisheng Xie <[email protected]>
Cc: "Michał Mirosław" <[email protected]>
Cc: Peter Rosin <[email protected]>
Cc: Mikulas Patocka <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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