cpu/intel/car/romstage.c: Remove unused <bootblock_common.h>

Change-Id: Ib47497cf8576063d42bc4a1dd2cc2e0fc56868d3
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42350
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/cpu/intel/car/romstage.c

@@ -2,7 +2,6 @@
 
 #include <arch/cpu.h>
 #include <arch/romstage.h>
-#include <bootblock_common.h>
 #include <console/console.h>
 #include <cpu/x86/smm.h>
 #include <arch/symbols.h>