Don't enable PUC_FASTINTR by default in the source. Instead, enable it

via the DEFAULTS kernel configs.  This allows folks to turn it that option
off in the kernel configs if desired without having to hack the source.
This is especially useful since PUC_FASTINTR hangs the kernel boot on my
ultra60 which has two uart(4) devices hung off of a puc(4) device.

I did not enable PUC_FASTINTR by default on powerpc since powerpc does not
currently allow sharing of INTR_FAST with non-INTR_FAST like the other
archs.

sys/alpha/conf/DEFAULTS

@@ -8,3 +8,5 @@
 
 # Pseudo devices.
 device		mem		# Memory and kernel memory devices
+
+options 	PUC_FASTINTR

sys/amd64/conf/DEFAULTS

@@ -12,3 +12,5 @@ device		isa
 # Pseudo devices.
 device		mem		# Memory and kernel memory devices
 device		io		# I/O device
+
+options 	PUC_FASTINTR

sys/dev/puc/puc.c

@@ -83,10 +83,6 @@ __FBSDID("$FreeBSD$");
 
 #include "opt_puc.h"
 
-#ifndef PUC_FASTINTR
-#define PUC_FASTINTR
-#endif
-
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>

sys/i386/conf/DEFAULTS

@@ -15,3 +15,5 @@ device		npx
 # Pseudo devices.
 device		mem		# Memory and kernel memory devices
 device		io		# I/O device
+
+options 	PUC_FASTINTR

sys/ia64/conf/DEFAULTS

@@ -11,3 +11,5 @@ device 		acpi		# ACPI support
 
 # Pseudo devices.
 device		mem		# Memory and kernel memory devices
+
+options 	PUC_FASTINTR

sys/pc98/conf/DEFAULTS

@@ -16,3 +16,5 @@ device		npx
 # Pseudo devices.
 device		mem		# Memory and kernel memory devices
 device		io		# I/O device
+
+options 	PUC_FASTINTR

sys/sparc64/conf/DEFAULTS

@@ -8,3 +8,5 @@
 
 # Pseudo devices.
 device		mem		# Memory and kernel memory devices
+
+options 	PUC_FASTINTR