EDAC/mc: Remove unnecessary cast to char * in edac_align_ptr()

Remove the forgotten (char *) casts as that function returns void *.

  [ bp: Rewrite commit message. ]

Signed-off-by: Eliav Farber <farbere@amazon.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220113100622.12783-3-farbere@amazon.com