CRIS: Define __read_mostly for CRISv32

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

arch/cris/include/arch-v32/arch/cache.h

@@ -7,6 +7,8 @@
 #define L1_CACHE_BYTES 32
 #define L1_CACHE_SHIFT 5
 
+#define __read_mostly __attribute__((__section__(".data.read_mostly")))
+
 void flush_dma_list(dma_descr_data *descr);
 void flush_dma_descr(dma_descr_data *descr, int flush_buf);