fbdev fixes and updates for kernel v5.19-rc6:

      fbcon now prevents switching to screen resolutions which are smaller
 than the font size, and prevents enabling a font which is bigger than
 the current screen resolution. This fixes vmalloc-out-of-bounds accesses
 found by KASAN.
 
 Guiling Deng fixed a bug where the centered fbdev logo wasn't displayed
 correctly if the screen size matched the logo size.
 
 Hsin-Yi Wang provided a patch to include errno.h to fix build when
 CONFIG_OF isn't enabled.
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Merge tag 'for-5.19/fbdev-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes from Helge Deller:

 - fbcon now prevents switching to screen resolutions which are smaller
   than the font size, and prevents enabling a font w