Fix remaining typos (#7921)

* Fix remaining typos

Found via `codespell -q 3 -S *.hex,*.pdf,./src/libm,./src/hidapi,./src/stdlib/SDL_malloc.c,./src/video/x11/edid.h -L caf,currenty,datas,einstance,fo,hda,lod,mata,parm,parms,pevent,pevents,pixelx,requestor,ser,statics,te,texturers,thid,uscaled,windowz`

src/atomic/SDL_atomic.c

@@ -85,7 +85,7 @@ extern __inline int _SDL_xadd_watcom(volatile int *a, int v);
   of the function.
 
   To generate the index of the lock we first shift by 3 bits to get
-  rid on the zero bits that result from 32 and 64 bit allignment of
+  rid on the zero bits that result from 32 and 64 bit alignment of
   data. We then mask off all but 5 bits and use those 5 bits as an
   index into the table.