qemu: kconfig: enable CONFIG_ARM_FFA_TRANSPORT

Always try to enable FF-A in the kernel. The kernel tries to probe for
FF-A, but only enables it if other components supports it.

Acked-by: Jerome Forissier <jerome@forissier.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

kconfigs/qemu.conf

@@ -11,3 +11,4 @@ CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
 CONFIG_GDB_SCRIPTS=y
 CONFIG_TRUSTED_KEYS=y
 CONFIG_ENCRYPTED_KEYS=y
+CONFIG_ARM_FFA_TRANSPORT=y