Fix two sparse warnings: - atafb.c:1092: sparse: Using plain integer as NULL pointer Use NULL instead of 0 when assigning a pointer. - atafb.c:2824: sparse: switch with no cases FBCMD_GET_CURRENTPAR and and FBCMD_SET_CURRENTPAR seem to be historic defines, which are not any longer in the kernel, and as such the code isn't built any longer and may be dropped. Fixes: d463633d63e6 ("fbdev: atafb: Add support for SuperVidel's SuperBlitter") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202609261313.kgFtkz2t-lkp@intel.com/ Cc: Miro Kropacek <miro.kropacek@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>