powerpc: mpc8xx: remove get_immr() argument

get_immr() is always called with 0 as an argument, so it is useless.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
diff --git a/arch/powerpc/include/asm/ppc.h b/arch/powerpc/include/asm/ppc.h
index 6ba1097..c3f73ef 100644
--- a/arch/powerpc/include/asm/ppc.h
+++ b/arch/powerpc/include/asm/ppc.h
@@ -40,11 +40,9 @@
 
 #include <asm/processor.h>
 
-static inline uint get_immr(uint mask)
+static inline uint get_immr(void)
 {
-	uint immr = mfspr(SPRN_IMMR);
-
-	return mask ? (immr & mask) : immr;
+	return mfspr(SPRN_IMMR);
 }
 
 static inline uint get_pvr(void)