fbdev/pxafb: Unexport symbol

fbdev/pxafb: Unexport symbol

Fix the compile-time warning

  drivers/video/fbdev/pxafb.c: warning: EXPORT_SYMBOL() is used, but #include <linux/export.h> is missing

The affected symbol is not used anywhere, so remove the function
entirely.

v2:
- remove unused functions (Helge)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Fixes: a934a57a42f6 ("scripts/misc-check: check missing #include <linux/export.h> when W=1")
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250612081738.197826-12-tzimmermann@suse.de