feat(makefile): incrementing minor version to reflect v2.5 release
feat(makefile): incrementing minor version to reflect v2.5 release

Updated the minor version in the makefile

Change-Id: Ie2b3ce5b36a105a0e2fff52c3740cc9702ca3108
Signed-off-by: Madhukar Pappireddy <c854e377c0ff08e0fa4357b6357bedff114c98a6@arm.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware