[MIPS] Update <asm/addrspace.h> header

- Fix traditional KSEG names
- Replace PHYSADDR with CPHYSADDR

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
diff --git a/board/gth2/gth2.c b/board/gth2/gth2.c
index 9bc4d3f..3e56678 100644
--- a/board/gth2/gth2.c
+++ b/board/gth2/gth2.c
@@ -36,7 +36,7 @@
 #define SDRAM_SIZE ((64*1024*1024)-(12*4096))
 
 
-#define SERIAL_LOG_BUFFER KSEG1ADDR(SDRAM_SIZE + (8*4096))
+#define SERIAL_LOG_BUFFER CKSEG1ADDR(SDRAM_SIZE + (8*4096))
 
 void inline log_serial_char(char c){
 	char *serial_log_buffer = (char*)SERIAL_LOG_BUFFER;