xtensa: Implement phys virt conversion for PTP_MMU

For PTP_MMU our physical address is not directly mapped
into virtual address space, we need to access physical
memory from those fixed map segments.

Implement phys_to_virt and virt_to_phys hook to reflect
this setting.

Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
diff --git a/arch/xtensa/include/asm/addrspace.h b/arch/xtensa/include/asm/addrspace.h
index 920b5fd..c8bed88 100644
--- a/arch/xtensa/include/asm/addrspace.h
+++ b/arch/xtensa/include/asm/addrspace.h
@@ -7,6 +7,8 @@
 #ifndef _XTENSA_ADDRSPACE_H
 #define _XTENSA_ADDRSPACE_H
 
+#include <config.h>
+
 #include <asm/arch/core.h>
 
 /*