asm-generic: rename page.h and uaccess.h

The current asm-generic/page.h only contains the get_order
function, and asm-generic/uaccess.h only implements
unaligned accesses. This renames the file to getorder.h
and uaccess-unaligned.h to make room for new page.h
and uaccess.h file that will be usable by all simple
(e.g. nommu) architectures.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/xtensa/include/asm/page.h

@@ -129,7 +129,7 @@ static inline __attribute_const__ int get_order(unsigned long size)
 
 #else
 
-# include <asm-generic/page.h>
+# include <asm-generic/getorder.h>
 
 #endif