soc/amd/picasso: Add console & timestamp buffers to psp_verstage

Create areas for console & timestamp data in psp_verstage and pass it to
the x86 to save for use later.

BUG=b:159220781
TEST=Build & Boot trembyle

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I41c8d7a1565e761187e941d7d6021805a9744d06
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42830
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/include/symbols.h

@@ -60,6 +60,7 @@ DECLARE_REGION(framebuffer)
 DECLARE_REGION(pdpt)
 DECLARE_REGION(opensbi)
 DECLARE_REGION(bl31)
+DECLARE_REGION(transfer_buffer)
 
 /*
  * Put this into a .c file accessing a linker script region to mark that region