Intel: Add common header file for CAR setup

When passing '-ffreestanding' the 'main' romstage.c may no longer
necessarily be considered the entry point.

From the C specification in 5.1.2.1 Freestanding environment;

"In a freestanding environment (in which C program execution may take
place without any benefit of an operating system), the name and type of
the function called at program startup are implementation-defined."

Clang complains about these being missing as Clang is somewhat more
strict about the spec than GNU/GCC is. An advantage here is that a
different entry-point type-signature shall now be warned about at
compile time.

Change-Id: I467001adabd47958c30c9a15e3248e42ed1151f3
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5872
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mainboard/asus/p2b/romstage.c b/src/mainboard/asus/p2b/romstage.c
index 22d3270f78..3c3f9eb32f 100644
--- a/src/mainboard/asus/p2b/romstage.c
+++ b/src/mainboard/asus/p2b/romstage.c
@@ -42,6 +42,7 @@ int spd_read_byte(unsigned int device, unsigned int address)
 	return smbus_read_byte(device, address);
 }
 
+#include <cpu/intel/car.h>
 void main(unsigned long bist)
 {
 	winbond_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);