[MIPS] Always do the ARC64_TWIDDLE_PC thing.

Always jump to the place where the kernel is linked to. This helps where
the bootloaders/proms ignores the start address inside the ELF header.
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/head.S

@@ -27,16 +27,6 @@
 
 #include <kernel-entry-init.h>
 
-	.macro	ARC64_TWIDDLE_PC
-#if defined(CONFIG_ARC64) || defined(CONFIG_MAPPED_KERNEL)
-	/* We get launched at a XKPHYS address but the kernel is linked to
-	   run at a KSEG0 address, so jump there.  */
-	PTR_LA	t0, \@f
-	jr	t0
-\@:
-#endif
-	.endm
-
 	/*
 	 * inputs are the text nasid in t1, data nasid in t2.
 	 */
@@ -157,7 +147,11 @@ NESTED(kernel_entry, 16, sp)			# kernel entry point
 
 	setup_c0_status_pri
 
-	ARC64_TWIDDLE_PC
+	/* We might not get launched at the address the kernel is linked to,
+	   so we jump there.  */
+	PTR_LA	t0, 0f
+	jr	t0
+0:
 
 #ifdef CONFIG_MIPS_MT_SMTC
 	/*

include/asm-mips/mach-ip27/kernel-entry-init.h

@@ -46,7 +46,14 @@
 	lh	t1, KV_RO_NASID_OFFSET(t0)
 	lh	t2, KV_RW_NASID_OFFSET(t0)
 	MAPPED_KERNEL_SETUP_TLB
-	ARC64_TWIDDLE_PC
+
+	/*
+	 * We might not get launched at the address the kernel is linked to,
+	 * so we jump there.
+	 */
+	PTR_LA  t0, 0f
+	jr      t0
+0:
 	.endm
 
 #endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */