[PATCH] rmobile: avoid deprecated srec_cat flags

[Ralph Siemsen]

On Tue, Apr 18, 2023 at 3:36 PM Marek Vasut <marek.vasut at mailbox.org> wrote:
> I'm afraid this needs some backward compatibility sreccat version check
> . Similar to GCC compiler flags presence check. To avoid breaking legacy
> users.

I'll revisit this after the rz/n1 work, which is more important.

Also I noticed that srec_cat is being called even when it is not
installed, which of course causes the build to fail. This is curious
since the makefile checks for srec_cat prior to using it.

Ralph