fix sysrq support in sn_console.c

In porting the sn_console driver to the serial core, we lost sysrq support. This patch fixes it and removes a few unncessary #ifdefs. Can you please send it on to Linus asap? sysrq is a *really* nice thing to have.

Pat, please shoot Andrew a mail if you have a problem with this, I'm sending it out now because I'm going to be gone for a few days and didn't want to wait.

Thanks,
Jesse

===== drivers/serial/Kconfig 1.42 vs edited =====

@@ -682,6 +682,7 @@
 	bool "SGI Altix L1 serial console support"
 	depends on IA64_GENERIC || IA64_SGI_SN2
 	select SERIAL_CORE
+	select SERIAL_CORE_CONSOLE
 	help
 		If you have an SGI Altix and you would like to use the system
 		controller serial port as your console (you want this!),

===== drivers/serial/sn_console.c 1.4 vs edited =====