microblaze: Do not use "la" pseudo instruction - use addik instead

"la" pseudo instruction is only translation to "addik".
Use directly "addik" which is described in the MB reference guide.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index ff949e3..e3c8d69 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -821,7 +821,7 @@
 	tovirt(r1,r1)
 #ifdef CONFIG_KGDB
 	addi	r5, r1, 0 /* pass pt_reg address as the first arg */
-	la	r15, r0, dbtrap_call; /* return address */
+	addik	r15, r0, dbtrap_call; /* return address */
 	rtbd	r0, microblaze_kgdb_break
 	nop;
 #endif