soc/intel: Drop unused #include <reg_script.h>

In some cases, the SoC did not even select `REG_SCRIPT` in Kconfig.

Change-Id: I617f332b80c534997e06a91247d1be90a85573be
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43138
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

src/soc/intel/baytrail/sd.c

@@ -5,7 +5,6 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
-#include <reg_script.h>
 
 #include <soc/iosf.h>
 #include <soc/nvs.h>