acpi: Remove explicit pointer tracking in per-device ssdt.

It's useless and error-prone.

Change-Id: Ie385e147d42b05290ab8c3ca193c5c871306f4ac
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7018
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/northbridge/intel/haswell/haswell.h

@@ -229,8 +229,6 @@ struct mrc_data_container *find_current_mrc_cache(void);
 #if !defined(__PRE_RAM__)
 #include "gma.h"
 int init_igd_opregion(igd_opregion_t *igd_opregion);
-unsigned long northbridge_acpi_fill_ssdt_generator(unsigned long current,
-						   const char *oem_table_id);
 #endif
 
 #endif