powerpc: fix typos in comments

Various spelling mistakes in comments.
Detected with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220430185654.5855-1-Julia.Lawall@inria.fr

arch/powerpc/kernel/process.c

@@ -305,7 +305,7 @@ static void __giveup_vsx(struct task_struct *tsk)
 	unsigned long msr = tsk->thread.regs->msr;
 
 	/*
-	 * We should never be ssetting MSR_VSX without also setting
+	 * We should never be setting MSR_VSX without also setting
 	 * MSR_FP and MSR_VEC
 	 */
 	WARN_ON((msr & MSR_VSX) && !((msr & MSR_FP) && (msr & MSR_VEC)));
@@ -643,7 +643,7 @@ static void do_break_handler(struct pt_regs *regs)
 		return;
 	}
 
-	/* Otherwise findout which DAWR caused exception and disable it. */
+	/* Otherwise find out which DAWR caused exception and disable it. */
 	wp_get_instr_detail(regs, &instr, &type, &size, &ea);
 
 	for (i = 0; i < nr_wp_slots(); i++) {