Fix of spelling in arch/sparc/kernel/leon_kernel.c no longer needed

This is a partial revert of commit 3ad2f3fb ("tree-wide: Assorted
spelling fixes") as the change in arch/sparc/kernel/leon_kernel.c has
been already fixed while refactoring the file in the sparc tree.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>