fix(fvp): correct neoverse-n1 CPU count on binary name

The 4-cores version should be used instead, otherwise several CPU
fails to boot as reported at [1].

[1] https://projects.linaro.org/browse/TFC-102

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I1b1ded89459a984aa03f23b356a78aad0b25bef9
1 file changed