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/include/cpu/x86/lapic.h

@@ -51,7 +51,6 @@ static inline __attribute__((always_inline)) unsigned long lapicid(void)
 	return lapic_read(LAPIC_ID) >> 24;
 }
 
-#ifndef __ROMCC__
 #if !CONFIG_AP_IN_SIPI_WAIT
 /* If we need to go back to sipi wait, we use the long non-inlined version of
  * this function in lapic_cpu_init.c
@@ -155,6 +154,5 @@ int start_cpu(struct device *cpu);
 #endif /* !__PRE_RAM__ */
 
 int boot_cpu(void);
-#endif
 
 #endif /* CPU_X86_LAPIC_H */