intel/quark: Remove extra steps on entry to romstage

Change-Id: I9297d5b4f7c8ed703fb8772739531cdd7d5ca5f0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34965
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/quark/include/soc/romstage.h

@@ -25,7 +25,6 @@
 #include <soc/car.h>
 #include <soc/reg_access.h>
 
-asmlinkage void car_stage_c_entry(void);
 void clear_smi_and_wake_events(void);
 void disable_rom_shadow(void);
 void *locate_rmu_file(size_t *rmu_file_len);