powerpc: Remove abs_to_virt() now all users have been fixed

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/abs_addr.h

@@ -20,7 +20,6 @@
 
 /* Convenience macros */
 #define virt_to_abs(va) __pa(va)
-#define abs_to_virt(aa) __va(aa)
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_ABS_ADDR_H */