alpha: fix ioread64be()/iowrite64be() helpers

Compile-testing the crypto/caam driver on alpha showed a pre-existing
problem on alpha with iowrite64be() missing:

ERROR: modpost: "iowrite64be" [drivers/crypto/caam/caam_jr.ko] undefined!

The prototypes were added a while ago when we started using asm-generic/io.h,
but the implementation was still missing. At some point the ioread64/iowrite64
helpers were added, but the big-endian versions are still missing, and
the generic version (using readq/writeq) is would not work here.

Change it to wrap ioread64()/iowrite64() instead.

Fixes: beba3771 ("crypto: caam: Make CRYPTO_DEV_FSL_CAAM dependent of COMPILE_TEST")
Fixes: e19d4ebc ("alpha: add full ioread64/iowrite64 implementation")
Fixes: 7e772dad ("alpha: Use generic <asm-generic/io.h>")
Closes: https://lore.kernel.org/all/CAHk-=wgEyzSxTs467NDOVfBSzWvUS6ztcwhiy=M3xog==KBmTw@mail.gmail.com/Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/alpha/include/asm/io.h

@@ -534,8 +534,10 @@ extern inline void writeq(u64 b, volatile void __iomem *addr)
 
 #define ioread16be(p) swab16(ioread16(p))
 #define ioread32be(p) swab32(ioread32(p))
+#define ioread64be(p) swab64(ioread64(p))
 #define iowrite16be(v,p) iowrite16(swab16(v), (p))
 #define iowrite32be(v,p) iowrite32(swab32(v), (p))
+#define iowrite64be(v,p) iowrite64(swab64(v), (p))
 
 #define inb_p		inb
 #define inw_p		inw
@@ -634,8 +636,6 @@ extern void outsl (unsigned long port, const void *src, unsigned long count);
  */
 #define ioread64 ioread64
 #define iowrite64 iowrite64
-#define ioread64be ioread64be
-#define iowrite64be iowrite64be
 #define ioread8_rep ioread8_rep
 #define ioread16_rep ioread16_rep
 #define ioread32_rep ioread32_rep