Drop prototype guarding for romcc

Commit "romcc: Don't fail on function prototypes" (11a7db3b) [1]
made romcc not choke on function prototypes anymore. This
allows us to get rid of a lot of ifdefs guarding __ROMCC__ .

[1] http://review.coreboot.org/2424

Change-Id: Ib1be3b294e5b49f5101f2e02ee1473809109c8ac
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/3216
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/intel/haswell/haswell.h

@@ -122,7 +122,7 @@
 # error "CONFIG_IED_REGION_SIZE is not a power of 2"
 #endif
 
-#ifndef __ROMCC__
+#if !defined(__ROMCC__) // FIXME romcc should handle below constructs
 
 #if defined(__PRE_RAM__)
 struct pei_data;