psp_verstage: remove psp_ef_table struct

psp_efs.h now has embedded_firmware struct which is copied from
amdfwtool. Remove psp_ef_table from psp_verstage and use it instead to
remove duplicates.

TEST=boot on zork and guybrush

Signed-off-by: Kangheui Won <khwon@chromium.org>
Change-Id: Ia362445cb7fc565b2d963f264461d833dc0338d0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58411
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/amd/picasso/psp_verstage/chipset.c

@@ -19,7 +19,7 @@ uint32_t get_max_workbuf_size(uint32_t *size)
 	return svc_get_max_workbuf_size(size);
 }
 
-uint32_t get_bios_dir_addr(struct psp_ef_table *ef_table)
+uint32_t get_bios_dir_addr(struct embedded_firmware *ef_table)
 {
 	return ef_table->bios1_entry;
 }