build/roms: Build 32-bit crossgcc for AArch64 as well

The 32-bit ARM cross compiler toolchain is used to build parts of
arm-trusted-firmware needed by AArch64 boards, compile the toolchain for
those boards as well.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

resources/scripts/build/boot/roms_helper

@@ -160,7 +160,7 @@ elif [ "${arch}" = "AArch64" ]; then
 	(
 		cat version > "${cbdir}/.coreboot-version"
 		cd "${cbdir}"
-		make crossgcc-aarch64 CPUS=$(nproc) # This is for aarch64, doesn't apply to armv7
+		make crossgcc-arm crossgcc-aarch64 CPUS=$(nproc) # This is for aarch64, doesn't apply to armv7
 	)
 fi