MIPS: CM: use __raw_ memory access functions

The CM registers use native endianness, so using plain readl & writel
will produce incorrect results on big endian systems.
Reported-by: NJeffrey Deans <jeffrey.deans@imgtec.com>
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6656/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mips-cm.h

@@ -96,13 +96,13 @@ static inline u32 *addr_gcr_##name(void)			\
 								\
 static inline u32 read_gcr_##name(void)				\
 {								\
-	return readl(addr_gcr_##name());			\
+	return __raw_readl(addr_gcr_##name());			\
 }
 
 #define BUILD_CM__W(name, off)					\
 static inline void write_gcr_##name(u32 value)			\
 {								\
-	writel(value, addr_gcr_##name());			\
+	__raw_writel(value, addr_gcr_##name());			\
 }
 
 #define BUILD_CM_RW(name, off)					\