soc/amd/picasso: Increase max APCB images to 5

An important piece of information contained in the APCB is a copy of
SPD-type data to use for soldered down memory.  The amdfwtool has
been updated with the ability to build five APCBs into the PSP's BIOS
Directory Table.  Modify Picasso's Kconfig and Makefile.inc to take
advantage of the flexibility, and pass the correct instance ID to
amdfwtool.

Change-Id: I0efa02cb35f187ca85a8f0d8bd574fc438e6dc0a
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36121
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index 5af830c..b5ecfc7 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -297,7 +297,32 @@
 config PSP_APCB_FILE
 	string "APCB file"
 	help
-	  The name of the AGESA Parameter Customization Block.
+	  The name of the AGESA Parameter Customization Block.  This image is
+	  instance ID 0 in the PSP's BIOS Directory Table.
+
+config PSP_APCB1_FILE
+	string
+	help
+	  If specified, this image is instance ID 1 in the PSP's BIOS
+	  Directory Table.
+
+config PSP_APCB2_FILE
+	string
+	help
+	  If specified, this image is instance ID 2 in the PSP's BIOS
+	  Directory Table.
+
+config PSP_APCB3_FILE
+	string
+	help
+	  If specified, this image is instance ID 3 in the PSP's BIOS
+	  Directory Table.
+
+config PSP_APCB4_FILE
+	string
+	help
+	  If specified, this image is instance ID 4 in the PSP's BIOS
+	  Directory Table.
 
 config PSP_APOB_DESTINATION
 	hex