alpha: lib: export __delay

__delay was not exported as a result while building with allmodconfig we
were getting build error of undefined symbol.  __delay is being used by:
drivers/net/phy/mdio-octeon.c

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/alpha/lib/udelay.c b/arch/alpha/lib/udelay.c
index 69d52aa..f2d81ff 100644
--- a/arch/alpha/lib/udelay.c
+++ b/arch/alpha/lib/udelay.c
@@ -30,6 +30,7 @@
 		"	bgt %0,1b"
 		: "=&r" (tmp), "=r" (loops) : "1"(loops));
 }
+EXPORT_SYMBOL(__delay);
 
 #ifdef CONFIG_SMP
 #define LPJ	 cpu_data[smp_processor_id()].loops_per_jiffy