soc/amd/common/fsp/Makefile: check if CONFIG_FSP_M_FILE is defined

When CONFIG_FSP_M_FILE isn't defined, the parameter of the file-size
call evaluates to an empty string, so the file-size call will run
"cat | wc -c" which will cause make to get stuck in there. Also print a
message when no FSP-M file is specified that the resulting image won't
boot successfully.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6b02774e2c79d12554fd076aa01bbe972176f372
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57189
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions