c6x: platforms: cache: Export symbol L1P_cache_block_invalidate and L1D_cache_block_writeback

They are needed by other modules, the related error with allmodconfig:

    MODPOST 3327 modules
  ERROR: "L1P_cache_block_invalidate" [drivers/misc/lkdtm.ko] undefined!
  ERROR: "L1D_cache_block_writeback" [drivers/misc/lkdtm.ko] undefined!
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Salter <msalter@redhat.com>

arch/c6x/platforms/cache.c

@@ -350,6 +350,7 @@ void L1P_cache_block_invalidate(unsigned int start, unsigned int end)
 			      (unsigned int *) end,
 			      IMCR_L1PIBAR, IMCR_L1PIWC);
 }
+EXPORT_SYMBOL(L1P_cache_block_invalidate);
 
 void L1D_cache_block_invalidate(unsigned int start, unsigned int end)
 {
@@ -371,6 +372,7 @@ void L1D_cache_block_writeback(unsigned int start, unsigned int end)
 			      (unsigned int *) end,
 			      IMCR_L1DWBAR, IMCR_L1DWWC);
 }
+EXPORT_SYMBOL(L1D_cache_block_writeback);
 
 /*
  *  L2 block operations