arch/x86/bootblock.ld: Account for the .data section

commit b7832de026 (x86: Add .data section support for pre-memory stages)
added a data section to the bootblock. This needs to be accounted for in
the linker script.

Change-Id: I39abe499e5e9edbdacb1697c0a0fc347af3ef9c4
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81434
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/x86/bootblock.ld

@@ -26,7 +26,7 @@ SECTIONS {
 
 	INCLUDE "bootblock/lib/program.ld"
 
-	PROGRAM_SZ = SIZEOF(.text);
+	PROGRAM_SZ = SIZEOF(.text) + SIZEOF(.data);
 
 	. = MIN(_ECFW_PTR, MIN(_ID_SECTION, _FIT_POINTER)) - EARLYASM_SZ;
 	. = CONFIG(SIPI_VECTOR_IN_ROM) ? ALIGN(4096) : ALIGN(16);