alpha: remove remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

The change in pci-iommu,c should be safe as arena has not been assigned
when we get to this point.

Some were within #if 0 blocks, have changed them and left the blocks
as they appear to be debugging infrastructure.

A #define FN __FUNCTION__ was removed and occurances of FN were replaced
with __func__ as well.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/alpha/kernel/srm_env.c b/arch/alpha/kernel/srm_env.c
index f7dd081..78ad7cd 100644
--- a/arch/alpha/kernel/srm_env.c
+++ b/arch/alpha/kernel/srm_env.c
@@ -199,7 +199,7 @@
 		printk(KERN_INFO "%s: This Alpha system doesn't "
 				"know about SRM (or you've booted "
 				"SRM->MILO->Linux, which gets "
-				"misdetected)...\n", __FUNCTION__);
+				"misdetected)...\n", __func__);
 		return -ENODEV;
 	}