soc/amd/sabrina: Add PRE_X86_CBMEM_CONSOLE_SIZE

Commit 86302a806c (soc/amd/{common,
cezanne,picasso}: Add PRE_X86_CBMEM_CONSOLE_SIZE) added this Kconfig
option before the initial commit that added soc/amd/sabrina as copy of
soc/amd/cezanne landed in the tree, so port the change forward to
Sabrina.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I2e8df5e7b7f1ac0af772e8c565f616a68b28e29e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61358
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/soc/amd/sabrina/Kconfig

@@ -130,6 +130,12 @@ config PSP_SHAREDMEM_SIZE
 	  started.  The workbuf's base depends on the address of the reset
 	  vector.
 
+config PRE_X86_CBMEM_CONSOLE_SIZE
+	hex
+	default 0x1600
+	help
+	  Size of the CBMEM console used in PSP verstage.
+
 config PRERAM_CBMEM_CONSOLE_SIZE
 	hex
 	default 0x1600