[MIPS] unexport __kmap_atomic_to_page

This patch removes the no longer used export of __kmap_atomic_to_page.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c
index 10dd2af..8f2cd8e 100644
--- a/arch/mips/mm/highmem.c
+++ b/arch/mips/mm/highmem.c
@@ -116,4 +116,3 @@
 EXPORT_SYMBOL(__kunmap);
 EXPORT_SYMBOL(__kmap_atomic);
 EXPORT_SYMBOL(__kunmap_atomic);
-EXPORT_SYMBOL(__kmap_atomic_to_page);