microblaze: Fix coding style issues

Fix coding style issues reported by checkpatch.pl.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index ac3d0a0f..4fcbad0 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -255,7 +255,7 @@
 	set_fs(USER_DS);
 
 #ifdef DEBUG_SIG
-	printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n",
+	pr_info("SIG deliver (%s:%d): sp=%p pc=%08lx\n",
 		current->comm, current->pid, frame, regs->pc);
 #endif
 
@@ -330,8 +330,8 @@
 	int signr;
 	struct k_sigaction ka;
 #ifdef DEBUG_SIG
-	printk(KERN_INFO "do signal: %p %d\n", regs, in_syscall);
-	printk(KERN_INFO "do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1,
+	pr_info("do signal: %p %d\n", regs, in_syscall);
+	pr_info("do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1,
 			regs->r12, current_thread_info()->flags);
 #endif