m68k: sun3: Remove unused orig_baddr in free_baddr()

When building with W=1:

arch/m68k/sun3/sun3dvma.c: In function ‘free_baddr’:
arch/m68k/sun3/sun3dvma.c:208:23: warning: variable ‘orig_baddr’ set but not used [-Wunused-but-set-variable]
196 | unsigned long orig_baddr;
| ^~~~~~~~~~

Fix this by removing the unused variable and assignment, which were
futile since their introduction in v2.4.5.2.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/m68k/sun3/sun3dvma.c

···
 	unsigned long len;
 	struct hole *hole;
 	struct list_head *cur;
-	unsigned long orig_baddr;
 
-	orig_baddr = baddr;
 	len = dvma_entry_use(baddr);
 	dvma_entry_use(baddr) = 0;
 	baddr &= DVMA_PAGE_MASK;