[PATCH] ppc32: Compile classic PPC specific ASM only on CONFIG_6xx

Newer binutils (2.15) when they know they aren't assembling for a
classic target (say e500 instead of 750) disallow certain opcodes,
causing the compile to fail.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/boot/common/util.S

@@ -27,6 +27,7 @@
 
 	.text
 
+#ifdef CONFIG_6xx
 	.globl	disable_6xx_mmu
 disable_6xx_mmu:
 	/* Establish default MSR value, exception prefix 0xFFF.
@@ -94,6 +95,7 @@ disable_6xx_l1cache:
 	sync
 	isync
 	blr
+#endif
 
 	.globl	_setup_L2CR
 _setup_L2CR: